President Trump has won Florida and Texas, the Associated Press projects — the first big battleground states to be called as the race between Trump and Joe Biden appears close in other key contests, potentially delaying a result for days.

The latest: "I’m here to tell you tonight, we believe we’re on track to win this election," Biden said early Wednesday morning. Trump tweeted that he'll make a statement too, declaring: "A big WIN!"

Joe Biden addressed supporters at a drive-in rally in Delaware at 12:40 am ET on Wednesday morning, as the presidential race remained too close to call and ballots remained uncounted in critical swing states like Pennsylvania, Michigan and Wisconsin.

What they're saying: Biden said that his campaign believes they are "on track to win this election," but stressed that "it ain't over until every vote is counted, every ballot is counted."

1. Politics: Partisanship is a public health threat
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3. Sports: NFL steps up coronavirus protocols with new mask requirements

Call it the long goodbye from the Paris Climate Agreement.

Driving the news: President Trump’s 2017 announcement withdrawing America from the 2015 accord becomes official at midnight Wednesday after a prolonged process required by the United Nations. It’s a chaotic coincidence that it comes the day after Election Day.

Republican Tommy Tuberville has defeated incumbent Sen. Doug Jones (D) in Alabama's U.S. Senate race, AP projects.

Why it matters: Although expected, the win by Tuberville — a former college football coach — is important for Republicans, who are fighting to keep control of the Senate.

Sen. Lindsey Graham (R-S.C) has won re-election against Democrat Jaime Harrison in a highly competitive and closely watched race for the U.S. Senate, AP projects.

Why it matters: Harrison raised massive amounts of money — including a record-breaking $57 million in Q3 — in his bid to unseat Graham, one of President Trump's closest allies in the Senate. Graham is chairman of the Senate Judiciary Committee and led the controversial push to confirm Supreme Court Justice Amy Coney Barrett a week before the election.

Former Gov. John Hickenlooper (D) has defeated incumbent Sen. Cory Gardner (R) in Colorado's Senate race, AP projects.

Why it matters: It's the first Senate seat that Democrats have flipped this election as they seek to take control of the upper chamber.

Tonight could be the start of days of suspense before we know who the next president will be. But it could also be effectively over by the end of the week — and there's a small chance we could even know tonight.

• Here are the three scenarios for election night and beyond, and how we'll know which one we're seeing tonight.

State election officials across the U.S. are warning voters of a wave of unidentified robocalls and texts that suggest voters stay home.

Why it matters: The robocall campaign has sparked fresh fears that misinformation could spread on Election Day, targeting Americans' cellphones to scare them away from the polls.

More than 100 million Americans voted early in the 2020 election across the U.S., according to state data compiled by the U.S. Elections Project.

Why it matters: The coronavirus pandemic and its resultant social-distancing measures prompted a massive uptick in both mail-in ballots and early voting nationwide, setting up an unprecedented and potentially tumultuous count in the hours and days after the polls close on Nov. 3.

The Trump campaign will run its election night war room at the Eisenhower Executive Office Building, located steps from the West Wing, the campaign confirmed to Axios.

Why it matters: The decision to move the main political operation from the campaign's headquarters in Arlington, Virginia, to the White House complex is the latest example of the Trump administration blurring the lines between governing and political activity.

Twenty years after astronauts moved in full time, the International Space Station is nearing its end, opening up a new geopolitical landscape above Earth.

Why it matters: The end of the program will force nations collaborating on the station, along with China and others new to the human spaceflight scene, to recalibrate. They could also turn their attention to cooperating — or competing — on the Moon instead.

Chairman of the Joint Chiefs of Staff Mark Milley held an off-the-record video call with top generals and network anchors this weekend to tamp down speculation about potential military involvement in the presidential election, two people familiar with the call tell Axios.

Why it matters: The nation's top military official set up Saturday's highly unusual call to make clear that the military's role is apolitical, one of the sources said — and to dispel any notion of a role for the military in adjudicating a disputed election or making any decision around removing a president from the White House.

When President Trump first took office, there was lots of talk about "normalization."

The state of play: Today, American voters will either codify a new normal or relegate many of Trump's unconventional tactics to history's anomalous footnotes. Among them is browbeating and boycotting U.S. companies.

The Ant Financial IPO will not go forward as planned Thursday, as Chinese regulators cracked down on what would have been the largest public offering of all time.

Why it matters: Jack Ma, the founder of the Chinese payments giant, gave a major speech at the end of October railing against financial regulation both in China and in the West. That speech resulted in a dressing-down from Chinese authorities — and the end of Ma's dreams that Ant would be able to go public.

Top executives at big companies known as corporate insiders bought back shares of their own firms' stock at the second lowest rate in at least two years last month, even as speculators continued to buy the dip.

Why it matters: Insiders are typically bullish on their own company and buy when prices fall, but declined to do so after all three major U.S. stock indexes fell by at least 2% during the month, the second consecutive month of declines. (The Dow fell 6%, its worst monthly showing since March's historic drop.)

If news organizations declare Joe Biden the mathematical president-elect, he plans to address the nation as its new leader, even if President Trump continues to fight in court, advisers tell Axios.

Why it matters: Biden advisers learned the lesson of 2000, when Al Gore hung back while George W. Bush declared victory in that contested election, putting the Democrat on the defensive while Bush acted like the winner.

The media and its gatekeepers have managed to make themselves a central story in the 2020 presidential election.

Why it matters: This is especially true on cable news, where mentions of terms like "misinformation" and "disinformation" have skyrocketed in the past few weeks, surpassing mentions of issues voters typically say they care about like "social security," "climate change," and "immigration."

Who Americans voted for in 2016 is a strong predictor of how they reacted to the deadliest pandemic in a century, according to a new study published in Nature.

Why it matters: The coronavirus doesn't care who someone voted for; it infects and kills whenever it is given the opportunity. By doing less social distancing, Republicans are giving it more opportunities, with predictable results.

The Democratic firm that predicted an election-night "red mirage" for President Trump — an early lead it says that Joe Biden will overtake when mail-in ballots are counted — is standing by its prediction, but with a smaller mirage than expected.

Driving the news: Updated modeling from analytics firm Hawkfish, reviewed by Axios, says Trump may look as if he's on track to cross 270 electoral votes and approach a 286-252 victory. But in the end, it predicts, Biden could win by as much as 334-204, or a more modest 279-259, once all mail-in ballots are counted.

We're not going to know the next president until we have a clear idea of who's winning the battleground states — and some of those results will be delayed as states sort through an avalanche of mail-in ballots.

The big picture: If it's close, Americans could face a days-long waiting game to find out who the president-elect will be — especially if it comes down to Pennsylvania, where we might not know the results until at least Friday.

One vote in the 2020 U.S. presidential election wasn’t cast from a voting booth or by mail, but from 250 miles up aboard the International Space Station.

The big picture: NASA astronaut Kate Rubins is far from the first person to exercise her civic duty from orbit. Cosmonauts and astronauts have voted from space for decades.

President Trump and Democratic presidential candidate Joe Biden's contrasting styles and attitudes toward the coronavirus pandemic were starkly evident on their final day of campaigning before the election.

The big picture: Trump held packed rallies as he criss-crossed states, with events in North Carolina, Michigan, Pennsylvania and Wisconsin on Monday. Biden's campaign focused on Ohio and Pennsylvania, seen as crucial to the election. His campaigning has been notable for precautions against COVID-19, such as holding drive-in rallies.

White House coronavirus task force coordinator Deborah Birx said in a memo Monday first obtained by the Washington Post that the U.S. is "entering the most concerning and most deadly phase of this pandemic."

Why it matters: In the memo on the eve of the election, Birx contradicts President Trump's repeated claims that the U.S. is "rounding the corner" in the virus fight, as she calls for "much more aggressive action" on the COVID-19 response.

Twitter and Facebook on Monday added labels to posts from President Trump that baselessly claimed a state Supreme Court ruling on absentee ballots in Pennsylvania will "allow rampant and unchecked cheating" and "induce violence in the streets."

Why it matters: Twitter has taken a more direct stance in labeling political tweets as misinformation than some counterparts, like Facebook, ahead of the 2020 election.