President Donald Trump won Maine's 2nd Congressional District, earning him a electoral vote, the Associated Press projected on Wednesday.
Democratic presidential nominee Joe Biden won Maine's statewide vote by some 72,000 votes. He also won Maine's 1st Congressional District, according to projections.
The projections mean Trump picked up one electoral vote from Maine while Biden earned three.
Maine is one of just two states in the nation to split its electoral votes if the vote count warrants.
Under a proportional vote system, the winner of each district gets an electoral vote while the statewide winner gets the two others.
Maine began the system in the 2016 election.
That race ended with Democratic nominee Hillary Clinton getting three electoral votes to Trump's one.
Trump won the election.
The tight 2020 race means the single vote could prove key, as a number of battleground states remain too close to call on Nov. 4.
Biden had won 227 electoral votes as of Wednesday afternoon, to Trump's 214, according to Decision Desk. That did not include the single Maine electoral vote.
A presidential candidate must receive 270 or more electoral votes to win the White House.
In the case of a tie, the House of Representatives decides between the top three candidates; the Senate chooses the vice president from among the top two candidates.
Wisconsin, Michigan, Nevada, Arizona, Pennsylvania, Georgia, and North Carolina have not been called.
Also in Maine, Sen. Susan Collins (R-Maine) declared victory on Wednesday.
Collins said she received a concession call from challenger Sara Gideon.
The win means Democrats are unlikely to flip the Senate, an oft-stated goal of the party.
Democrats say they're in position to keep control of the House.