U.S. President Donald Trump won Florida, the nation’s most prized battleground state, as he and Democrat Joe Biden on Tuesday battled to the finish of an epic campaign that will shape America’s response to the surging pandemic and foundational questions of economic fairness and racial justice.

The two men were locked in tight races across the country, with Trump also claiming the battlegrounds of Ohio and Iowa while Biden won Minnesota, two modest prizes the president had hoped to steal.

Races were too early to call in some of other fiercely contested and critical states on the map, including North Carolina, Georgia and Pennsylvania. The president, by early Wednesday, had retained many states he won in 2016 and, as long predicted, the race in part seemed to rest on the three northern industrial states where Trump most surprised the Democrats four year ago Michigan, Wisconsin and Pennsylvania.

The Trump campaign also filed a lawsuit on Wednesday in Michigan to halt the counting of ballots as the tally showed Biden leading in the battleground state.

"We have filed suit today in the Michigan Court of Claims to halt counting until meaningful access has been granted. We also demand to review those ballots which were opened and counted while we did not have meaningful access," the campaign said in a statement.

The campaign also said it would ask for a recount in Wisconsin, a state The Associated Press (AP) called for Biden on Wednesday afternoon. Campaign manager Bill Stepien cited "irregularities in several Wisconsin counties."

The Trump campaign then said it would also be suing to stop vote counting in the battleground state of Pennsylvania over a "lack of transparency." The campaign claimed Democratic officials have been "hiding" ballot counting from Republican poll observers.

Just minutes later, Stepien declared the president's "victory" in Pennsylvania despite only about 85% of the votes having been counted and no definitive projections from news networks.

Millions of voters braved their worries about the virus – and some long lines – to turn out in person, joining 102 million fellow Americans who voted days or weeks earlier, a record number that represented 73% of the total vote in the 2016 presidential election.

Early results in several key battleground states were in flux as election officials processed a historically large number of mail-in votes. Democrats typically outperform Republicans in mail voting, while the GOP looks to make up ground in Election Day turnout. That means the early margins between the candidates could be influenced by which type of votes – early or Election Day – were being reported by the states.

Trump and Biden were locked in a tight race in Florida, and it was too early for The Associated Press to call the perennial battleground state. Florida has a history of close elections, including the state’s 2018 governor’s race, which went to a recount. The AP was waiting on more votes to be counted in south Florida, including Miami-Dade County, the largest county in the state.

Control of the Senate was at stake, too: Democrats needed to net three seats if Biden captured the White House to gain control of all of Washington for the first time in a decade. Senate Majority Leader Mitch McConnell of Kentucky won reelection in an early victory for the Republicans, and GOP Sen. Lindsey Graham of South Carolina, a close Trump ally, fought off a fierce challenge to hang onto his seat.

The parties traded a pair of seats in other early results: Democratic former Colorado Gov. John Hickenlooper defeated incumbent Sen. Cory Gardner, and in Alabama Republican Tommy Tuberville knocked off Sen. Doug Jones. The House was expected to remain under Democratic control.

As the results began to come in, the nation braced for what was to come – and an outcome that might not be known for days.

Biden was watching from home with family and close aides. Trump was watching the results come in with a small group of allies in the White House residence as other staff and advisers floated between a party at the White House residence and various offices throughout the executive mansion complex.

Outside, a new anti-scaling fence was erected around the White House, and in downtowns from New York to Denver to Minneapolis, workers boarded up businesses lest the vote lead to unrest.

With the worst public health crisis in a century still fiercely present, the pandemic – and Trump’s handling of it – was the inescapable focus for 2020.

For Trump, the election stood as a judgment on his four years in office, a term in which he bent Washington to his will, challenged faith in its institutions and changed how America was viewed across the globe. Rarely trying to unite a country divided along lines of race and class, he has often acted as an insurgent against the government he led while undermining the nation’s scientists, bureaucracy and media.

Biden spent the day last-minute campaigning in Scranton, Pennsylvania, where he was born, and in Philadelphia with a couple of local stops in Wilmington, Delaware, where he was spending Election Night.

The momentum from early voting carried into Election Day, as an energized electorate produced long lines at polling sites throughout the country. Turnout was higher than in 2016 in numerous counties, including all of Florida, nearly every county in North Carolina and more than 100 counties in both Georgia and Texas. That tally seemed sure to increase as more counties reported their turnout figures.

Voters braved worries of the coronavirus, threats of polling place intimidation and expectations of long lines caused by changes to voting systems, but appeared undeterred as turnout appeared it would easily surpass the 139 million ballots cast four years ago.

No major problems arose on Tuesday, outside the typical glitches of a presidential election: Some polling places opened late, robocalls provided false information to voters in Iowa and Michigan, and machines or software malfunctioned in some counties in the battleground states of Ohio, Pennsylvania, Georgia and Texas.

The cybersecurity agency at the Department of Homeland Security said there were no outward signs by midday of any malicious activity.

The record-setting early vote – and legal skirmishing over how it would be counted – drew unsupported allegations of fraud from Trump, who had repeatedly refused to guarantee he would honor the election’s result.

With the coronavirus now surging anew, voters ranked the pandemic and the economy as top concerns in the race between Trump and Biden, according to AP VoteCast, a national survey of the electorate.

Voters were especially likely to call the public health crisis the nation’s most important issue, with the economy following close behind. Fewer named health care, racism, law enforcement, immigration or climate change

The survey found that Trump’s leadership loomed large in voters’ decision-making. Nearly two-thirds of voters said their vote was about Trump – either for him or against him.