None of it made voters less motivated: Nearly 100 million people cast their ballots early, more than two-thirds of the total number of votes cast in the 2016 election.
Here's what to watch for on Election Day.
Finally, the counting begins
Polls will begin closing at 6pm ET (12pm Wednesday NZ time) in parts of Kentucky and Indiana, and the first results will begin rolling in soon after that. Both are securely in the Trump column.
After that, there are a few states that may determine early on whether this election might be resolved on the night — or whether we are in for a long week or (yikes) month.
If Biden wins Georgia, Florida or North Carolina, Trump has an even slimmer path to victory.
Polls begin closing in Florida at 7pm ET (1pm Wednesday NZ time). Polls in the Panhandle, which is on Central time, will close an hour later. Florida officials have already processed the state's record-breaking early vote, which has been almost evenly divided between Republicans and Democrats. Watch for those to be announced shortly after 8pm.
Unless the margin is razor thin — it's been known to happen in Florida — there is a good chance that the state will be called before bedtime on the East Coast.
Polls in Georgia also close at 7pm. Final results could be known within a few hours as well.
North Carolina's polls close at 7.30pm. Most of the early vote there has already been counted, so this is another state that is likely to be called on the night, unless it is very close.
If Biden does not win any of those three states (or Texas, where most of the state polls close at 8pm), that will ratchet up the importance of the so-called blue wall of Pennsylvania, Michigan and Wisconsin, which Trump flipped from Democrats in 2016 and where polls show Biden ahead. Trump needs to hold on to just one of them to win reelection, assuming he keeps the rest of his 2016 winning map. That's a big assumption: He is defending a half-dozen states he won in 2016, and slightly trailing in some polls in Georgia and Arizona.
It all may come down to Pennsylvania. Polls there close at 8pm, but Pennsylvania won't begin counting its early votes until the following morning. The in-person voting is expected to be overwhelmingly Republican, so Trump may jump out to an early-night lead.
Don't get misled; the early voting has been overwhelmingly Democratic. Polling shows Biden with a narrow lead in Pennsylvania, though Trump's poll-defying victory there in 2016 — and the effort by his campaign this time to turn out first-time voters who Republicans say have been overlooked by pollsters — has made this state one of the big mysteries of the night. It could take days to finish counting Pennsylvania's votes.
Polls in Wisconsin close at 9pm ET, but the state's municipal clerks won't begin to count early votes until the polls open the morning of Election Day; a tight race might mean it will take a day or more before a winner is declared. In Milwaukee, the state's largest city, officials said they would not release the results of any early voting until all ballots were counted — a process that isn't likely to end until around 4am Thursday (NZ time).
The final poll closing in Michigan is 9pm as well, though most of the state's polls will be closed at 8pm. Early voting has been heavy here as well, and counting those votes didn't begin until Tuesday. This is another one that could take a while.
There will be a few later-night states out West that are worth keeping in mind: Nevada, which Trump has sought to pull back from the Democrats, and Arizona, which Biden has been trying to put into the Democratic column.
Trump will host an East Room gathering
Four years ago, a superstitious Trump did not have a victory speech written before election night. Now, with the president expecting no definitive winner on election night, and his campaign lawyers trying to use state rules to stop the counting of mail-in votes after Election Day, he has no plans to deliver any sort of concession.
That's a confident posture that will be tested if Trump loses Florida, which would all but close off his already narrow path to reelection. Aides said they expected him to declare victory if he won Florida, but it's not clear what it would mean even if he did. A win in Florida would keep him in the race, but attention would then turn immediately to the Northern battlegrounds of Pennsylvania, Wisconsin and Michigan.
Like the election itself, Trump's election night plans are still in flux. The White House has invited 400 people to the East Room and was planning for everyone attending to be tested for the coronavirus. There was no official invitation sent to many guests invited: The president's secretary called them to extend the invitation personally. But officials said they expected a lot of attrition and were not certain how many people would show up.
Some of the president's closest allies in the Senate, like Lindsey Graham of South Carolina and Mitch McConnell of Kentucky, the majority leader, will be back in their home states watching their own election results. Several Republican lawmakers on Capitol Hill have declined invitations to fly aboard Air Force One or visit the White House grounds since it became clear that the president and his staff were not adhering to the CDC's health guidelines.
And then there's this: Many people in the president's circle think he is likely to lose. A brief burst of optimism a few weeks ago has settled into concern about their own careers, post-Trump. Coupled with expectations of large protests around the White House, and the coronavirus, it was not seen by all invitees as the see-and-be-seen event of the year.
For Biden, it is a wait-and-see day
Today is the day Biden has been waiting for since he first began thinking about running for president in the early 1980s, and it will look nothing like he imagined. There will be no party, no raucous election night headquarters and no big speech to a room of cheering supporters, win or lose.
Biden never expected the capstone of his political career to fall during a pandemic — or against an opponent already making noise about declaring victory before all the votes are counted.
In one last push to win Pennsylvania, where early voting has lagged, the former vice president will make Election Day stops in Scranton, where he was born, and Philadelphia, where Black turnout four years ago was lower than forecast. Biden is expected to deliver remarks sometime late on election night or the following morning from Wilmington, Delaware, but if the result remains in flux he may wait.
It's unclear what Biden would do if Trump declared himself the winner before there was clarity in enough states to accrue the necessary 270 electoral votes. Biden, after a campaign premised largely on the idea of returning to presidential norms, would be stepping far out of character if he too called himself the winner before results were known in enough states.
If he wins, Biden will be at a major inflection point for his party whenever he finally speaks before a national television audience. Having built a diverse coalition held together mainly by its antipathy toward Trump, Biden's first moves as president-elect would provide distinct clues about what sort of presidency he hopes to lead — and how he may navigate what could be the most contentious presidential transition since 1876, when Rutherford B. Hayes and Samuel Tilden disputed the result of the election up until two days before the inauguration.
The fight for the Senate
Control of the Senate is also among the biggest issues being decided, with the result going a long way toward determining the contours of the federal government for at least the next two years.
If Biden wins the presidency, Democrats need to flip a net of three Senate seats to take control of the chamber; if Trump is reelected, they will need four.
There are 12 competitive Republican-held seats; two Senate Democrats have competitive races.
The biggest prize is Georgia, where Senators David Perdue and Kelly Loeffler both face stern tests from Democratic challengers Jon Ossoff and the Rev. Raphael Warnock. (Loeffler also faces a challenge from Republican Representative Doug Collins, in a special all-in primary.) The state requires a winner to get at least 50 per cent of the vote, or else either contest (or both) will be decided in a runoff in January.
Polling suggests Democrats are favoured to pick up seats held by Senators Cory Gardner of Colorado and Martha McSally of Arizona, and lose the one held by Senator Doug Jones of Alabama.
The other big toss-up contests are in Maine and North Carolina, where Republican Senators Susan Collins and Thom Tillis face fierce challenges from Democrats Sara Gideon and Cal Cunningham.
Most of these candidates' fates are likely tied to the result of the presidential race in their states. In 2016, Republican Senate candidates won every state Trump carried, while Democrats won every state that backed Hillary Clinton.
Democratic candidates in Kansas, Montana and South Carolina, where Biden has not competed, and Iowa, where Trump leads in the latest polling, have raised record-shattering amounts of money in hopes they can outperform the top of their ticket.
With control of the House unlikely to change, the ability of Democratic candidates for Senate in these states to outrun Biden may determine the shape of Congress next year.
When will it end?
This might be the biggest question of the night. Or the week.
The first thing to watch for is what the two candidates do if Biden wins Florida. Many Democrats speculate (hope might be a better word) that it would lead Trump to confront a difficult reality and concede. That is probably unlikely.
But consider this: Should he take Florida, there will be pressure on Biden to declare victory quickly, especially from Democrats who remember what happened in Florida in 2000 when Al Gore, the Democrat, prematurely conceded to George W. Bush.
If Trump holds on to Florida, watch out for the lawyers. There are likely to be legal challenges — mainly from Trump — to early votes cast across the country. Trump has laid the groundwork with his unfounded warnings about voter fraud and by dispatching lawyers ready to challenge the legitimacy of votes cast.
And if Pennsylvania is close, expect that state to be ground zero for legal action that could keep this election unresolved right through Thanksgiving.
Written by: Reid J. Epstein, Annie Karni and Adam Nagourney
Photographs by: Brittainy Greeson
© 2020 THE NEW YORK TIMES