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Good evening and thank you so much for joining us.

It was a day of ceremony in the Senate against a backdrop of new allegations against the

president. Chief Justice John Roberts took the oath. And moments

later, he swore in senators, each pledging impartial justice in the impeachment trial of President

Trump. House managers formerly read the charges against Mr. Trump, who becomes just the third

president in American history to face a Senate trial, but the first to do so while running for re-election.

But just as history was unfolding on Capitol Hill, a government agency ruled the president

broke the law by withholding aid from Ukraine. And tonight, there are explosive new accusations

by a witness who says the president knew everything about efforts to dig up dirt

on Joe Biden. We have all the developments covered tonight. Ben Tracy is at the White House,

but we're going to begin with Nancy Cordes on Capitol Hill.

Nora, even as this trial gets underway, new evidence continues to emerge. And what these 100

senators are going to have to decide

at the end of the day is whether all the evidence taken together warrants the removal of the

president from office. So help you God. I do. Senator Chuck Grassley whispered, God bless you,

after Chief Justice John Roberts took the reins in the Senate trial.

Will all senators now stand?

His first act, swearing in the Senate, which will serve as the jury.

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