Control of the House is still unclear, but President-elect Donald J. Trump and the Republican Party, which has already won a majority in the Senate, are expected to bring significant policy shifts to Congress and cases already before the Supreme Court.

In the days before the election, senior administration officials insisted that Biden was at peace with his decision to leave the presidential race and had no regrets. Biden dropped out of the race in July and then endorsed Harris -- a decision the senior administration official said the president made in the days before while in Rehoboth Beach,

Former President Trump has won the election in key swing states such as Georgia and Pennsylvania, and is projected to win the necessary 270 Electoral College votes, while Republicans have taken back the Senate majority.