The U.S. Democratic Party officially controls the Senate. Schumer becomes the majority leader of the Senate.

January 21 – With three senators sworn in on the afternoon of the 20th local time, the Democratic Party of the United States officially took control of the Senate, consolidating the majority of half of the two parties.

According to the report, with the vote of Vice President Harris as President of the Senate, the Democratic Party became the Senate majority.

According to ABC, Bloomberg and other U.S. media, after three senators were sworn in, Schumer became the majority leader of the Senate and McConnell became the minority leader.