In a first vote, the Senate confirmed Biden's nominee for director of national intelligence, Avril Haines.
The new Senate majority leader, Chuck Schumer, D-N.Y., urged colleagues to turn the spirit of the new presidentās call for unity into action.
The three Democrats complete a Senate narrowly split 50-50 between the parties, but giving Democrats the majority with Harris able to cast the tie-breaking vote.
Speaker Nancy Pelosi is expected to soon transmit to the Senate the House-passed article of impeachment against Trump, charged with incitement of insurrection, a step that will launch the Senate impeachment trial.
Progressive and liberal Democrats are eager to do away with the filibuster to more quickly advance Bidenās priorities, but not all rank-and-file Senate Democrats are on board.