Updated at 7:55 p.m. ET

At about 7 p.m. ET Monday, House impeachment managers delivered to the Senate an article of impeachment against former President Donald Trump, a move that prompts preparations for a historic trial.

Updated at 4:58 p.m. ET

Sen. Patrick Leahy, D-Vt., will preside over former President Donald Trump's trial in the Senate, a Senate source told NPR. Leahy, 80, is the president pro tempore of the Senate, a constitutional role given to the longest-serving lawmaker in the majority party. The president pro tempore is third in the line of presidential succession, after the vice president and House speaker.

Updated at 2:15 p.m. ET

President Biden on Monday repealed a controversial Trump-era ban on transgender people serving in the U.S. military.

Biden signed an executive order on the issue as he met in the Oval Office with new Defense Secretary Lloyd Austin, Chair of the Joint Chiefs of Staff Mark Milley and Vice President Harris.

Speaking briefly to reporters, Biden said the order will allow all "qualified Americans to serve their country in uniform."

President Biden will reimpose a ban on many non-U.S. citizens attempting to enter the country. The move is an attempt to limit the spread of COVID-19 and contain new variants of the disease that have cropped up in several countries around the globe, according to media reports Sunday.

Almost exactly one year after the first case of the coronavirus was detected in the United States, the country has now reached 25 million confirmed infections. As it has for months, the U.S. remains by far the most coronavirus-riddled country in the world.