Envelopes with the certified votes from the Electoral College are brought in two mahogany boxes to the Capitol, and the vice president presides over a joint session in which the certificates are examined to determine they are authentic, with clear instructions for declaring a winner.
“The person having the greatest number of votes shall be the president,” the amendment goes on, unless there is a tie or nobody has secured a majority, in which case the House decides.
The job has occasionally been unpleasant for vice presidents. In 1961, the state of Hawaii sent two slates of electors and the vice president, Richard M. Nixon, who had just lost the election to John F. Kennedy, moved to count the Democratic electors, which expanded his own margin of defeat. Forty years later, Al Gore was in a similar spot, burdened with overruling objections from his fellow Democrats and declaring the victory of George W. Bush — and his own defeat — after a drawn-out Florida recount that was ended by the Supreme Court. And in 2017, Biden, then the vice president, had to reject a Democratic challenge to Trump’s victory.