In a close race, the presidential election could be decided by an unlikely spot: Nebraska’s Second Congressional District, including Omaha and most of its suburbs.

If the race is decided there, Joe Biden appears to have the advantage, according to a New York Times/Siena College poll. He leads President Trump by seven points, 48 percent to 41 percent, among likely voters in the first nonpartisan survey of the district so far this year, according to FiveThirtyEight.

The district is traditionally Republican, but Mr. Trump carried it by only two percentage points in 2016. It was even closer than familiar battleground states like Arizona or North Carolina.

The district’s demographics have made it an even more plausible pickup opportunity for Mr. Biden. It’s relatively white, metropolitan and well educated, and national polls routinely show Mr. Biden running ahead of Hillary Clinton’s 2016 performance among all three groups.

Two polls, two substantial Biden leads. Joe Biden has been leading by about seven points nationally for as long as this page has been on the internet, and there’s no indication that’s changing. A new Times/Siena poll Sunday found him ahead by eight points, and a new ABC News/Washington Post poll had similar findings.

One twist: The ABC/Post poll released two sets of results for the presidential race. Mr. Biden led by 10 points in a one-on-one matchup against the president, but he led by six points in a four-way race with named minor-party candidates. Most polls asking both versions of the question haven’t shown anywhere near so large a gap, but Mr. Biden has tended to do about a point worse when the minor-party candidates are listed.

As an aside, our tables will average multiple versions of a poll, which is why they show Mr. Biden with an eight-point lead in the ABC/Post poll. At least in this case, that may be closer to the truth: Naming the minor-party candidates can often inflate their support, but it’s not a true one-on-one race either.

Be careful with new polls in Wisconsin and Michigan. There has been no shortage of good news for Mr. Biden in the Upper Midwest, and this weekend was no exception. NBC/Marist polls showed him with a significant lead in Michigan and Wisconsin. But this time, it’s worth taking those results with a grain of salt: They’re not weighted by education.

(Weighting by education is critical for understanding modern polling and what went wrong in 2016.) In practice, it means the NBC/Marist polls probably have too many college graduates represented and are probably too good for Mr. Biden.

Strong Democratic results in the Senate. CBS/YouGov joined a long list of firms to show very close races in Georgia and North Carolina. It also offered some promising news for Democrats in their pursuit of the Senate. It found Cal Cunningham up by 10 points against the Republican incumbent, Thom Tillis, in North Carolina, and even found Senator Lindsey Graham locked in a tight race with Jaime Harrison in South Carolina. Another poll, conducted by a Democratic firm, even found Mr. Harrison narrowly ahead.

State of the race at the end of the day: The same as it was on Friday: A solid lead for Joe Biden.

A clear majority of voters believe the winner of the presidential election should decide who will fill the Supreme Court seat left open by the death of Justice Ruth Bader Ginsburg. About 56 percent of likely voters said they preferred to have the election act as a sort of referendum on the vacancy. Only 41 percent said they wanted President Trump to appoint a justice before November.

The coronavirus pandemic, economic distress and racial justice protests have done little to reshape a presidential campaign that polls show has been remarkably stable. Joe Biden’s eight-point lead nationally is propelled by a wide advantage among women and voters of color. Mr. Biden has made gains among constituencies that strongly favored the president in 2016, including men and older voters.

There weren’t many polls today, which is expected. It’s a Friday, and many pollsters will try to produce a final poll just before the debate Tuesday. That means they’re probably in the field or just wrapping up right now.

The polls we did get largely reinforced the big picture: a solid Biden lead, but with President Trump keeping it somewhat closer in the battleground states likeliest to decide the election.

To feel comfortable, Mr. Biden has one goal: claim a solid lead in just one more state. He has a fairly consistent lead in the states won by Hillary Clinton, plus Wisconsin and Michigan. From there, any other flipped battleground state would get him over the top. But that final piece — probably Pennsylvania, Florida or Arizona — hasn’t always given Mr. Biden a consistent or comfortable lead. Sometimes the polls are good for Mr. Biden. Sometimes they’re good for the president. The same can be said of today’s polls.

Data for Progress, and Biden’s discomfort. Taken together, the Data for Progress results could be considered fine for Mr. Biden. The Texas result (Trump only +1) again raises the possibility that Mr. Biden could win in a landslide with more than 400 electoral votes.

But if the Data for Progress results are viewed through the lens of Mr. Biden’s quest for one last state with a comfortable lead, then none of the results are particularly good for him. They’re all fairly close, and Mr. Biden’s worst result — trailing by one in Arizona — comes in the state where it seemed most likely that Mr. Biden had a good shot of claiming some security.

Here’s a different way of looking at it: Mr. Trump can keep his hopes alive as long as he stays close in Pennsylvania, Florida and Arizona, but he’d be in serious jeopardy if any one of them slipped out of play. Today’s polls kept them in play.

A Democratic poll of Nevada that’s not so great for Biden? There’s also the poll of Nevada from ALG Research, a Democratic pollster. It’s a somewhat curious release. As a rule, the quality of partisan polls is as high as that of any reputable public pollster, but most of them are used only internally. Which means if you’re seeing a partisan poll released in the wild, it’s because someone wanted you to see it.

In this case, it’s not a particularly great result for Mr. Biden. He’s up four points in Nevada, a state Mrs. Clinton won in 2016, and it comes just after a Fox News poll showed Mr. Biden up by double digits there. Usually, partisan polls are released because they show good news for the party’s candidate. So why release bad news? Perhaps if you’re legitimately worried about a state, and want to make sure people take it seriously.

An early Supreme Court tidbit. ABC/Washington Post had a good set of numbers for Democrats on the coming Supreme Court battle, suggesting that more people trusted Mr. Biden to choose a Supreme Court justice, or would prefer that the winner of the election get to choose. The poll was taken before the nomination of Amy Coney Barrett, which undoubtedly could have a big effect on public opinion. But the results suggest that Democrats start on firm ground at the outset of what’s sure to be a bitter fight.

More national data to come. We’ll get a lot more data this weekend, including a new Times/Siena national poll, the rest of the ABC/Washington Post poll, and almost certainly more.

Historically, a lot of the major national pollsters like to conduct a poll just ahead of the debates, so they can come back and see how things change afterward. This year, the Supreme Court vacancy gives the big pollsters even more reason to weigh in.

The polls just ahead of the first debate tend to be pretty accurate. Here’s one that might surprise you: Four years ago, Mrs. Clinton led by just 1.2 points in national polling heading into the first debate, according to FiveThirtyEight. She wound up winning the national vote by 2.1 points — the pre-debate polling was even closer to the election result than the (already fairly accurate) final national poll numbers.

Today was a pretty typical day of polling for this point in the race. There were a lot of polls. Some were good and some were bad — whether in terms of quality or what it meant for your preferred candidate. But if you took all the polls together Thursday, you wound up in about the same spot you started at the beginning of the day, though Fox News did try to shake things up at the very end.

If you’re a Biden supporter, you might have taken a measure of happiness from encouraging results in Ohio, Georgia and Iowa, including our own Times/Siena polls. You might also have fretted about your lowest national number from YouGov in a long time, or been disappointed that your dream of a Blue Texas was a little farther (down by three in our poll) from reality than you hoped. But the polls were almost exactly in line with the average in the most important battleground states, like Pennsylvania, Wisconsin and Arizona.

If you’re a Trump supporter, you may have found encouragement in YouGov numbers showing a mere five-point race nationwide and a tighter contest in Wisconsin and Michigan than other pollsters have found. But there was nothing that would have changed the fact that the president was behind in polling in states worth upward of 350 electoral votes, including Ohio and Iowa, which Mr. Trump carried easily four years ago.

Now about those Fox polls … The well-regarded Fox News polling team released three state surveys, in Nevada, Ohio and Pennsylvania. They were awfully good for Mr. Biden.

Fox has him up 11 in Nevada, a figure that evokes the 👀 emoji. Fox also has Mr. Biden up seven in Pennsylvania, the kind of result he had been looking for in recent days. And the poll showed Mr. Biden up five points in Ohio, a state Mr. Trump carried by eight points in 2016.

It’s great news for Mr. Biden, but it’s worth taking these results with a grain of salt. Fox News state polls have consistently had fantastic results for Mr. Biden, including near double-digit leads for him in Arizona and Wisconsin immediately after the Republican convention. And it’s also worth mentioning that the Fox polls tilted pretty far to the left in key 2018 Senate races.

Ohio, really? The biggest eye-popper is Ohio. Fox wasn’t alone in showing Mr. Biden ahead. Quinnipiac had him up by a point. Even if you assume these pollsters tend to produce results that tilt to the left, they still support the idea of a highly competitive race.

It’s been a bit hard to know what to expect from Ohio. There haven’t been many high-quality polls there in 2020, and the polls severely underestimated Republicans in 2016 and 2018. The state is traditionally highly competitive, but it swung so hard to Mr. Trump in 2016 that few would have put it toward center of the electoral map.

If you’ve been following along here, you’ll have noticed that many of the states with the biggest shifts toward Mr. Biden have been relatively white states in the North or Upper Midwest, like Maine, Minnesota and Wisconsin. Ohio isn’t exactly like those states, but the northwestern part of the state is somewhat similar to the rest of the Farm Belt, and the Trump campaign has aired plenty of advertisements in the state. Taken together, it seems we should consider pretty seriously that it’s a close race there at this point.

State of the race at the end of the day: Still solid for Biden, and if the Ohio polls are any indication, a little better for him than it was yesterday.

Over the last few weeks, Joe Biden has often seemed to do well in the state polls but not necessarily in the national polls. Today, it’s the opposite, and that makes it a fine day to roll out a new chart of the difference between our poll average nationwide and in the so-called tipping-point state:

What’s the tipping-point state? It’s the one that would get either candidate his 270th electoral vote if he won every other state that’s more favorable to him. In 2016, it was Wisconsin: If Hillary Clinton had won every state where she was stronger than Wisconsin (the states she carried, plus Pennsylvania and Michigan), then it all would have come down to Wisconsin, the tipping point.

Back in 2016, Donald J. Trump won Wisconsin by 0.8 percentage points, while he lost the national vote by 2.1 points. That three-point difference is a measurement of the president’s relative edge in the Electoral College, and that’s about what our poll averages say today.

As you can see, the president’s relative edge in the Electoral College appeared to grow a bit Wednesday because Mr. Biden did well in the national polls but somewhat poorly in the state polls.

A good day for Trump in state polling. If you’ve been reading along recently, you know that Mr. Biden has had a good run of polls in Michigan and Wisconsin. That’s enough for 258 electoral votes — just short of the 270 needed to win — if you also give him the states carried by Mrs. Clinton.

From there, he would need one more state: maybe Arizona (in conjunction with Nebraska’s Second District or Maine’s Second District) or Florida or Pennsylvania. And while that might seem easy enough, President Trump has stayed somewhat competitive in polls of those states. On Wednesday, he was particularly competitive in these states:

If you scan down the list, you won’t see too many polls suggesting that Mr. Biden is up by more than seven points (as he is nationwide) in Arizona, Florida or Pennsylvania. You’ll even see something we haven’t seen much of so far this year: the color red.

Trump’s best polls of the cycle? ABC/Washington Post found the president leading in Arizona and Florida. When you factor in the firm, the polls are arguably his best of the whole cycle.

The ABC/Post poll is a high-quality survey. It’s so good that it has tended to beat the average of all other polls in a race. But it can also be a somewhat noisy poll, especially at small sample sizes like these, since it doesn’t have many ways to control the composition of the sample, like weight on party registration. (You may recall an eyepopper in the other direction from the ABC/Post poll last week, showing Mr. Biden with a 16-point lead in Minnesota. Same idea.)

Outlying results are a common — and expected — part of polling, even from the best pollsters. That’s part of why the average of all polls is helpful. The average shows Mr. Biden with a slight or modest advantage in both Arizona and Florida, and he has similar edges there in the other polls published today.

But there’s no way to confuse these polls with the kind of results we’ve seen nationwide or in Wisconsin. And until that’s true, the president’s path to re-election will be a bit easier than the national polls suggest.

A good day for Biden everywhere else. Well, everything else looked pretty good for Mr. Biden.

Almost all the national polls showed him ahead by at least seven points. A Monmouth poll showed the president with a modest lead in Georgia, which counts as a pretty good result for Mr. Trump at this point. We’ll get another reading on the race there — as well as in Iowa and Texas — from our Times/Siena College polls tomorrow.

State of the race at the end of the day Today was not a good day for Mr. Biden by the measure that matters most: whether he has a clear and comfortable lead in states worth 270 electoral votes. Even so, he still leads in our average of Florida, Arizona and Pennsylvania — and therefore in the race for the White House.

We often focus on the battleground states that decided the last election and seem likeliest to decide the next one. Today, we got polls from two states that Donald J. Trump won handily in 2016, and they’re an important reminder of the wide range of possibilities in this election.

An even race in Iowa and Georgia. We haven’t had much high-quality polling in either Iowa or Georgia recently, but we got one for each state Tuesday: from Ann Selzer in Iowa and from The Atlanta Journal-Constitution in Georgia (conducted by the University of Georgia). They found the same result: a tie.

The Des Moines Register poll of Iowa, conducted by Ms. Selzer, is always highly anticipated: She is one of the most respected pollsters in the country. This time, it comes as the Biden campaign begins airing advertisements in the state. It’s not hard to see why.

What the results don’t have in common. These polls share something important: They show tied races in states that Mr. Trump won fairly comfortably in 2016 (by nine in Iowa and by five in Georgia). But what’s behind these shifts is quite different.

In Iowa, Joe Biden seems to be securing large, broad gains among white voters. He’s benefiting from a similar shift across the Northern and mostly white battleground states — think Minnesota, Wisconsin, Michigan and Maine.

In Georgia, there’s a shift among college-educated white voters, particularly in the well-educated suburbs of Atlanta. But the state’s white working-class population remains staunchly Republican. Unlike in Iowa, demographic changes are also on Mr. Biden’s side. Georgia is growing fast, and it’s increasingly diverse.

Landslide? Georgia and Iowa might be competitive, but for Mr. Biden victories there would probably merely be icing on the cake: If he has won them, he’s almost certainly already won other battleground states like Florida and Pennsylvania, on track to a total nearing 400 electoral votes.

That’s a genuine possibility. We’re all understandably focused on the states likeliest to decide the election, like Pennsylvania and Florida. Those states remain close enough that Mr. Trump remains competitive. But states like Texas, Georgia, Ohio and Iowa also remain very competitive. In fact, they’re even closer than Florida or Pennsylvania — so close that a Biden landslide is just as real a possibility as a Trump victory.

Here’s a different way to think about it: If Mr. Biden outperformed today’s polls by just two points, he would be declared the winner early on election night. Florida would be called by around 8 p.m., and Texas could be the state that makes Mr. Biden the president-elect. (Yes, Texas). He’d have a good shot at the largest electoral vote landslide since 1988.

But if Mr. Trump outperformed the polls by the same margin, suddenly we’d have an extraordinarily close race on our hands, potentially waiting days or weeks while mail-in votes were counted in Pennsylvania, Michigan and Wisconsin.

How is it possible for the race to teeter on the edge between a landslide and a close contest? A lot of it depends on the president’s apparent resilience in Pennsylvania and Florida. There aren’t a ton of polls in these states, so it’s possible that Mr. Biden has a wider lead than we think. But Mr. Biden holds just under a five-point lead in Pennsylvania and a two-point lead in Florida, according to our averages, even as he fights to a draw in places where Democrats haven’t won in decades.

If Mr. Biden has gained as much in Pennsylvania and Florida as it seems he has in Iowa and Texas, this would be a different story.

Not much new nationally. We did see a pair of national polls with Mr. Biden up by seven points, more or less consistent with our average.

State of the race at the end of the day: Mr. Biden’s leading in major battlegrounds, and even in a few states that Mr. Trump won handily four years ago. A landslide is still possible. But until Mr. Biden claims a more consistent and wider lead in a state like Pennsylvania — more like his seven-point lead nationwide — Mr. Trump will remain more competitive than you might guess from the steady stream of poll results hinting at a possible blowout.

A poll that had seemed to show a shifting race really didn’t show much change at all.

A new look from U.S.C. tracking. On Monday, the U.S.C.-Dornsife tracking poll released a new cut of its data. The results were eye-popping: It turns out that its previous poll results didn’t mean what many people — including me — thought they meant. The new results are good news for Joe Biden.

This is not an ordinary tracking poll. It’s a panel survey, which means respondents are contacted repeatedly. The benefit of a panel survey is potentially significant: If the results change, it’s because the attitudes of the respondents change, not because of changes in the composition of the sample. This was an ominous sign for Mr. Biden: His lead in the survey fell to just seven points, down from 12, from Sept. 11 to 17, suggesting a tightening race.

But it turns out that the U.S.C. pollsters were doing something odd. They showed their last seven days of results, but interviewed each respondent only once every two weeks. The problem is that one week of respondents was relatively favorable to Mr. Biden, just by chance, while another was relatively favorable to President Trump. As a result, U.S.C.’s results oscillated between a wide Biden lead and a tighter race, depending on whether the last week of interviews was the good or bad week for Mr. Biden. It turned the poll’s potential biggest advantage — the ability to track change over time — into a liability.

Today, U.S.C. released the results over two weeks, not just one, and they tell a totally different story. The poll now shows a fundamentally stable race, with Mr. Biden maintaining something like a 10-point lead, rather than a volatile race that has swung from Biden plus-13 to Biden plus-7 and back. With U.S.C. showing less change, an important point in the case for substantial tightening can be crossed off the list. Mr. Biden’s lead bounced back to seven points in our average as a result.

Nope, still no shy Trump voters. There has been no shortage of articles about the possibility that President Trump’s supporters are part of a silent majority that, as a group, do not reveal their true vote intention to pollsters. Morning Consult decided to put the theory to the test, and on Monday released the results of a new experiment.

It found a group of voters online, then conducted the survey with half of the respondents over the phone and the other half online. If voters were afraid to divulge their support for the president, the theory goes, perhaps Mr. Trump would have more support online, where supporters wouldn’t have to express their views to a person on the phone.

The survey found that it didn’t make much of a difference. (It did make a difference for some socially awkward or possibly embarrassing questions, like those about people’s personal finances or attitudes about discrimination.)

It’s still possible that such voters exist. Even if they don’t, the polls can be wrong for all sorts of other reasons. But there’s really just no serious evidence to support the idea that these voters exist in meaningful numbers, and there was no such evidence in 2016, either.

A look ahead to the bottom of the table. So far, we’ve mainly focused on the states likely to decide the race. This week, the polls seem poised to focus on a different group of states: those that are highly competitive and yet unlikely to tip the election, like Georgia, Iowa, Ohio and Texas. The reason is simple: If Mr. Biden were to win them, he has probably won already. He has probably won Arizona if he’s won Texas; he has probably won Wisconsin if he’s won Iowa; he has probably won North Carolina if he’s won Georgia.

You can find these states at the bottom of our poll average table on this page. As you can see, Mr. Biden could easily win these states. And if he did, it would be a blowout.

So far this week, we’ve received two polls of these states: a YouGov poll showing Mr. Trump up by just two points in Texas and a Democratic GBAO poll showing Biden up by three in Georgia.

On Tuesday, we’ll get an Atlanta Journal-Constitution poll of Georgia. At some point soon, we’ll get the presidential results from the vaunted Ann Selzer poll of Iowa.

To this point, polling in these states has been highly competitive. We’ll see what the results suggest.

State of the race at the end of the day: It still seems like a comfortable Biden lead.

It will be a while until we have a good understanding of public opinion in the aftermath of the death of Supreme Court Justice Ruth Bader Ginsburg. Most high-quality polls are conducted over three or more days, so we’ll have to wait to see many full poll results. Even then, those results will reflect only the state of play at the outset of what’s sure to be a long fight.

The early results are decent for Biden. We do have our first results from a few quick online surveys. YouGov found that voters didn’t want President Trump to appoint a new Supreme Court justice before the 2021 presidential inauguration, by a margin of 51 percent to 42 percent, and that if President Trump did appoint a new justice, they did not want the Senate to seat him or her.

Ipsos found that a much larger majority of Americans — 62 percent — think that the winner of the presidential election should replace Justice Ginsburg, while just 23 percent disagreed.

Why the big difference? Question wording. The results of issue questions are often highly sensitive to the wording of the question. In this case, the huge difference between the Ipsos and YouGov results might be explained by a common bias in questionnaire design: acquiescence bias.

In general, people tend to be nice and agreeable, so questions that simply ask voters to agree or disagree with a statement will generally find higher support for “agreement” than a similar question with a forced choice between opposing ideas.

In this case, if the pollster simply asks whether the respondent agrees that the winner of the election should replace Justice Ginsburg, most voters might say “yes.” But if you give the same respondents a second option — whether President Trump should choose the nominee — you can bet that plenty of Trump supporters would take the option, even though they might have agreed, if asked the other question, that the winner should decide. That’s probably a better reflection of the politics of the issue.

More of the same in the horse race. There weren’t too many polls this weekend, but most of them were very consistent with what we thought we already knew: a modest but still significant advantage for Joe Biden.

Maybe the most noteworthy one was an NBC/Wall Street Journal poll, the first live-interview, education-weighted national survey in a while. It found Mr. Biden up by eight points among registered voters, with a net one-point shift in the president’s direction since August. On balance, that’s better for Mr. Biden than both the trend line and the average.

Status of the polls at the end of the day: Waiting to see how Supreme Court politics will reshape the race.

We’ve been lucky to have a lot of high-quality state polling this month. It has given us a really good look at several states where we received almost no high-quality polling in 2016, like Minnesota and Wisconsin. At times, these polls have suggested that Joe Biden is faring extremely well.

But the wave of state polling has come at a cost: fewer national polls. On Friday, we got some. And they weren’t as great for Mr. Biden as the state polls, raising some questions.

Cloudy national picture The national polls contained a mix of good and bad news for both sides.

The good news for Mr. Biden: Ipsos, Data For Progress and Global Strategy Group/GBAO/Navigator Research showed him with a comfortable lead and holding his ground — or gaining — compared with prior surveys.

A four-point lead for Mr. Biden from AP/NORC, a particularly bad number for him when you consider the poll is of all Americans, not likely or registered voters, and its prior survey showed him up by 12 in June.

A seven-point lead from U.S.C./Dornsife, which remains about four points smaller than it was a week ago.

In the middle is an eight-point lead for Mr. Biden from NPR/Marist. The trend line here is decent enough for Mr. Biden, but the poll is not weighted for education, which usually means the poll underestimates the president.

Why the national polls matter The national popular vote won’t decide the election, as Hillary Clinton can attest. So who cares about the national polls?

They have one really important use: We can track change over time. Most firms have conducted several national polls this year, so we can say how things have changed over recent months. Polls by the same firm in the same state, on the other hand, tend to happen less frequently. That makes it hard to say whether things have been changing over the last few weeks.

Taken in isolation, the national polls we do have over the last week suggest that the race is stable or even moving a bit toward the president, who now trails by just six points in our average.

A state-national gap? In contrast, the state polls in the last week most certainly do not suggest that the race is moving toward the president, or that there’s a six-point race nationally.

Today’s polls were no exception. Here’s one simple way to look at it: If you take a straight average, Mr. Biden ran about 8.7 points ahead of Mrs. Clinton across all of the state polls Friday. Add that to her 2.1-point victory in the popular vote, and maybe you’d guess Mr. Biden was up 10.8 points nationwide. You can see that for yourself on the right-hand column of our daily poll tables, if you haven’t noticed:

What explains the difference? Noise is always a possibility, and it could also go in the other direction — we could get a Biden +16 result from a high-quality pollster tomorrow, for instance. But I do think that would be a bit of a surprise, given how many mid-single-digit results we’ve seen this week.

Another possibility is that Mr. Biden has actually lost a bit of ground nationally while holding his own or is even gaining in the battleground states. That’s certainly plausible, especially since Mr. Biden has tended to make his largest gains among white voters, who are disproportionately overrepresented in the battleground states, while struggling to match Mrs. Clinton’s numbers among nonwhite voters. Where is Mr. Biden’s best state poll result today, compared with the 2016 result? It’s Maine, the state where non-Hispanic whites represent the largest share of the population in the country.

There are other possible differences, like the effect of campaign ad spending. The polling firms could be relevant, too: The state polling firms have generally been of higher quality. But state and national polls have generally been in alignment this cycle. If this recent difference persists, we’ll really dive in.

State of the race at the end of the day Mr. Biden ends the week with a clear advantage in the battlegrounds, but still some question marks about whether or how things are shifting nationally.

The good part for Mr. Biden is simple: On Thursday, he led in every poll of North Carolina, Florida and Arizona — five polls in all. President Trump carried all of these states four years ago. Together, winning those states would probably put Mr. Biden well over 300 electoral votes.

The good news for the president is that he didn’t trail in any of those states by very much, and he stayed close in a state that has seemed in danger of slipping away: Arizona.

Trump still hanging on in Arizona? On Wednesday, I noted that if you penciled in Wisconsin and Michigan for Mr. Biden — given his recent run of strong leads there from high-quality pollsters — he would essentially be one battleground state away from crossing 270 electoral votes. The most plausible options are probably Pennsylvania or Arizona, assuming he also carries Nebraska’s Second District.

The polls have been pretty split in Arizona, with some showing a close race and others showing a commanding Biden lead. With Mr. Biden eyeing just one more state with a comfortable edge, a commanding Biden lead in Arizona would have significant consequences for the electoral map.

He led a Monmouth University poll by a slim margin, while a Kaiser Family Foundation poll showed him up by five. That latter result is probably closer to two or three points because it’s a poll of registered voters, rather than of likely voters. Arizona is a state where a poll of registered voters will overstate Democratic support quite a bit because it has a large and heavily Democratic, but relatively low-turnout, Latino vote.

Arizona voted for Mr. Trump by 3.5 points in 2016, so it’s hard to consider the results bad news for Mr. Biden. But if he’s up by only three points in the state, as today’s polls might suggest, maybe Pennsylvania — where there has been less polling recently — might be the better option for Mr. Biden to find his 270th electoral vote. And the polls haven’t been all been great for Mr. Biden there, either.

Think twice about that Biden lead in North Carolina Today there was a Suffolk University poll showing Mr. Biden up by four points in North Carolina, which would be a strong showing in a state where our averages suggest a dead heat.

Unfortunately, this poll has a major problem: The share of respondents who are college graduates is too big. In polling lingo, this means they didn’t “weight by education,” and it’s critical for understanding modern polling and what went wrong in 2016.

The problem is simple. College graduates are likelier to take political surveys, but they are also far likelier to oppose Mr. Trump. So if pollsters don’t do anything to make sure they properly represent people without a college degree, they’ll have results that are too good for Democrats. The most common way to address this is to “weight” by education, which simply means you give more weight to your respondents who aren’t college graduates. Many pollsters didn’t weight by education in 2016, and it’s one of the major reasons the state polls were biased toward Hillary Clinton. Many state pollsters have addressed this since then. Suffolk doesn’t appear to be one of them.

If you look at the poll release, Suffolk reports that about 49 percent of its respondents have a college degree or higher. This is way too high, and particularly a problem in North Carolina. The state has a huge educational divide among white voters: Mr. Biden routinely wins white college graduates in North Carolina polls in liberal bastions like Raleigh, Durham and Asheville, but Mr. Trump can lead white voters without a degree by 50 points in rural evangelical areas.

Pew recently published a handy table of estimates for the share of the electorate with a college degree. As it notes, there’s no such thing as the “right” number, since you’re trying to estimate the composition of an electorate in an election that hasn’t happened yet. But the truth is probably closer to Pew’s estimate for North Carolina, 38 percent. (The Times/Siena polls have that number at 37.) This poll would almost certainly have been much better for the president if it had been weighted by education. In a state like North Carolina, it could have erased all of Mr. Biden’s lead in the survey.

Best for last: On Friday, New NYT/Siena College polls in Maine, Arizona and North Carolina My colleagues Alexander Burns and Matt Stevens will have the story, with some key Senate results, posting first thing in the morning. Keep an eye out for it.

State of the race at the end of the day A clear Biden advantage, but still searching for a comfortable lead in the 270th electoral vote.

Another good day for Biden in Wisconsin. On Tuesday, I said that we’d have an unusually clear picture of the race in Wisconsin if the ABC News/Washington Post poll Wednesday found Joe Biden ahead by at least five points. That’s exactly what we got: The poll showed Mr. Biden up by six points among likely voters in Wisconsin.

It puts him in a strong position in the state, hovering at or above 50 percent with a consistent lead in an unusual number of recent high-quality surveys.

Wisconsin was the “tipping point” state in 2016 — the one that pushed President Trump over the Electoral College threshold. It remains crucial to Mr. Trump’s re-election hopes, and many thought Wisconsin would be a real challenge for Mr. Biden. The state has a large share of white working-class voters, who swung hard to Mr. Trump in 2016. On top of that, Mr. Biden seemed to be weaker in the suburbs of Milwaukee than he was in suburbs elsewhere in the country. And finally, the unrest in Kenosha last month seemed to give Mr. Trump another opening.

But unrest in Kenosha didn’t lead to a change in the state of the race in Wisconsin, and that might say a lot about the national political environment. If the president can’t break through in Wisconsin now — in the immediate aftermath of the Republican convention and unrest in Kenosha — when could he?

If you pencil in Mr. Biden’s leads in Wisconsin and neighboring Michigan, he’s essentially one flipped battleground state away from crossing 270 electoral votes.

An eye-popper in Minnesota ABC News/Washington Post also released a poll of neighboring Minnesota, showing Mr. Biden ahead by 16 points in a state Hillary Clinton won by only 1.5 in 2016.

To be clear: It’s pretty unlikely that Mr. Biden is actually ahead by 16 points in Minnesota. It’s probably a noisy, outlying result. But the poll joins a host of other high-quality surveys — including from CBS News/YouGov and The New York Times/Siena College — showing Mr. Biden ahead by at least nine points in the state. His lead might not be 16 points, but it’s large, and it’s real.

An even bigger eye-popper in Maine Quinnipiac released a poll of Maine with incredibly strong results for Democrats: a 21-point lead for Mr. Biden in a state Mrs. Clinton won by only three points in 2016, and a 12-point lead for the Democrat Sara Gideon in a hotly contested race against the incumbent Republican senator, Susan Collins.

A word of caution: Quinnipiac has leaned quite a bit to the left in this cycle; I recommend nudging these to the right a few points in your head before taking them to the bank. And that’s even before considering the possibility that it’s an outlier, like the ABC/Washington Post poll in Minnesota. That said, you could cut Mr. Biden’s lead in half and it would still be a strong result for Democrats.

Most of all, know that Maine is a very underpolled state. It’s hard to say it’s an outlier without any other polls for comparison. Tread carefully. Fortunately, we’ll have a second opinion in a few days from a Times/Siena College poll.

A split between state and national polls? If you look over the state polls so far this week, you see a run of strong results for Mr. Biden — some of his best of the cycle. But if you look at the national releases, you see stability, or even a bit of tightening.

One possibility is that it’s just noise: The national polling is pretty sparse and often of fairly questionable quality. And some of the state polling for Mr. Biden — like the Quinnipiac poll — comes from firms with a record of showing him doing particularly well.

But it’s also possible that it reflects a real split, perhaps driven by demographics: Most of the great results for Mr. Biden in recent state polls have come in overwhelmingly white states, and there are plenty of national (and state) poll results suggesting that Mr. Biden is running ahead of Mrs. Clinton among white voters but faring worse among nonwhite voters. If so, it might lead to seemingly surprising results for Mr. Biden in overwhelmingly white states like Minnesota and Maine without corresponding national leads.

Of course, it’s not necessarily a bad trade for Mr. Biden. After all, Mrs. Clinton probably would have traded a few points nationwide for greater support in the Midwest.

Good news for Democrats in the Senate. Along with the wide lead for Democrats in Maine, Quinnipiac found a tied race in the South Carolina Senate race. And OH Predictive Insights found the Democratic challenger Mark Kelly up by 10 points in his Arizona Senate race. They’re not the first polls to show an unexpectedly tight race in South Carolina and a wide lead for Democrats in Arizona. We’ll get another poll in Arizona on Thursday from Monmouth University.

This is around the time when convention bounces start to diminish. It’s still too soon to say whether President Trump’s bounce will fade or endure, but Tuesday was arguably Joe Biden’s best day of state polls since the Republican National Convention.

The best news for Biden in a while in Florida. A poll from Monmouth University showed Mr. Biden up four percentage points among likely voters on average, his best result from a nonpartisan, live interview pollster there in several weeks. He held a wide lead in Florida over the summer, but it has gradually slipped — in part because of a somewhat surprising weakness among Latino voters. The Monmouth poll shows no signs of that weakness today, with Mr. Biden leading by 26 points among Hispanic voters, comparable to Hillary Clinton’s performance four years ago. If Mr. Biden can match Mrs. Clinton among Hispanic voters, he’ll be in a strong position: Polls consistently show Mr. Biden running ahead of Mrs. Clinton among white voters.

Now, gauging the support of Hispanic voters in Florida is not easy. About a third of the state’s Hispanic voters are Cuban, and they are overwhelmingly concentrated in the Miami area — the toughest area of the state to reach in a survey. As a group, those voters lean Republican. But the other two-thirds are heavily Democratic and live across the state. On top of that, Hispanic voters are harder to reach in general. They’re younger and concentrated in urban areas, and many speak Spanish as a first language, which adds further difficulties — and costs — for pollsters.

All that to say: In Florida a lot will hinge on how pollsters can measure a relatively small group of hard-to-reach voters. So interpret any single result among Latino voters with caution, especially in Florida.

Another poll showing Trump trailing badly in Wisconsin. One place where the polls have offered consistently bad news for the president is Wisconsin, where Mr. Biden has held a steady lead. Today, a CNN/SSRS poll added to the consensus by showing Mr. Biden up by 10 points, one of his largest leads there this cycle. The firm also gave Mr. Biden a three-point lead in North Carolina, another result consistent with a clear national advantage for the former vice president. One note of caution: CNN/SSRS polls have tended to tilt to the left compared with the average of polls so far this cycle, as well as in 2018.

Tomorrow, we expect another poll of Wisconsin from ABC News/Washington Post. If it joins the club of high-quality pollsters showing at least a five- or six-point lead for Mr. Biden, that would yield about as clear of a picture as you’re going to get in a battleground state so far from an election.

A stable day nationwide. There weren’t many national polls today, but the handful we did get were largely consistent with their prior results and with a fairly stable race.

Odds and ends Morning Consult had a relatively weak result for Mr. Biden in Minnesota, though there’s plenty of other recent polling there showing Mr. Biden with a wider lead. Florida Atlantic University showed a tied race in Florida, though the firm doesn’t have much of a track record and its methodology is a mixed bag. Virginia Commonwealth University gave Mr. Biden a double-digit lead in Virginia.

Simple as it is, “What do the polls say?” is by far the question I’m asked most — by my colleagues, my editors, my friends and family, and by hundreds of you on Twitter. Even if you’re not looking for polls, it can sometimes feel as if the polls find you. More often than not, confusion follows.

That’s why we built this page. Ideally, it’s a place where you can get the state of the race at a glance and the polling news of the day, just about every day.

Most days, I’ll summarize the most recent polling. Sometimes, that summary will be “nothing much happened,” and you can go about your day. Other days, I’ll highlight major polls or longer-term trends, or I’ll go on a bit of a methodological digression that might help you make sense of the sometimes arcane world of polling. Or maybe an individual poll result will make enough of a splash to merit a post of its own.

You’ll find polling averages of the most competitive states. The goal is to summarize the state of the polls. It’s not a forecast or a prediction. Just because we’re showing you the average of public polls doesn’t mean we’re telling you that they’ll be right. The polls have been wrong before, and they’ll be wrong again.But despite their flaws, polls remain the best way to measure attitudes across a huge and diverse country. We might not even be aware that an election is close if we talk only to our like-minded friends and relatives. (For those who want to know more about our polling averages, we published a detailed account of our methodology here.)

You’ll also see a table showing what the results might look like if the polls are off by about as much as they were in the last two presidential races. Of course, the polls could be more accurate, less accurate or exactly the same as they were the last two times. And this particular measure — the average error over the final three weeks — is a little unfair to those pollsters, who tended to produce more accurate results over the final week. But it serves as a simple reminder that there’s still a wide range of possible results on Nov. 3.

You’ll find information about our polls, conducted in partnership with Siena College. We’ll be polling nearly nonstop between now and the election. We’ll have more to say about our specific plans soon.

And finally, a big thanks to our friends at FiveThirtyEight, who compile polling data, including the set used here, and make it available to the public. And, of course, to the pollsters themselves, who do the hard (and expensive) work of conducting these surveys in the first place.

Our poll averages include all polls collected by FiveThirtyEight. The estimates adjust for a variety of factors, including whether a poll represents likely voters, whether other polls have shifted since a poll was conducted, and whether a pollster has leaned toward one candidate in a state or nationwide. Polls are weighted by recency, sample size, and by whether they’re conducted by a firm with a track record of success. More details here. Source for polls: FiveThirtyEight polling database. * In Maine and Nebraska, two electoral votes are apportioned to the winner of the state popular vote, and the rest of the votes are given to the winner of the popular vote in each congressional district. (Maine has two congressional districts, and Nebraska has three.) † Poll error in 2016 is calculated using averages of state polls conducted within three weeks of Election Day.

Source: https://www.nytimes.com/live/2020/presidential-polls-trump-biden/new-york-times-siena-college-poll-of-nebraskas-2nd-congressional-district

News – New York Times/Siena College poll of Nebraska’s 2nd Congressional District