Presidential electors are meeting across the United States on Monday, December 14 to formally choose Joe Biden as the country's next president, The Associated Press reports.

Monday is the day set by law for the meeting of the Electoral College. In reality, electors meet in all 50 states and the District of Columbia to cast their ballots. The results will be sent to Washington and tallied in a Jan. 6 joint session of Congress over which Vice President Mike Pence will preside.

The electors’ votes have drawn more attention than usual this year because President Donald Trump has refused to concede the election and continued to make baseless allegations of fraud.

Biden is planning to address the nation Monday night, after the electors have voted. Trump, meanwhile, is clinging to his false claims that he won the election, but also undermining Biden’s presidency even before it begins. “No, I worry about the country having an illegitimate president, that’s what I worry about. A president that lost and lost badly,” Trump said in a Fox News interview that was taped Saturday.

Following weeks of Republican legal challenges that were easily dismissed by judges, Trump and Republican allies tried to persuade the Supreme Court last week to set aside 62 electoral votes for Biden in four states, which might have thrown the outcome into doubt. The justices rejected the effort on Friday.

Biden won 306 electoral votes to 232 votes for Trump. It takes 270 votes to be elected.