The U.S. Senate takes formal steps on Thursday to consider the removal of U.S. President Donald Trump on charges that he abused his power, even as key issues such as whether witnesses will appear at his impeachment trial remain up in the air.
Harris' request comes the same day President Trump celebrated being "in major record territory" for the number of judges he has successfully placed on the bench.
Pelosi delayed signing the impeachment articles while she waited for word from McConnell about the trial's scope.
Members of the House Judiciary Committee would serve as prosecutors, or impeachment managers.
The managers are a diverse group with legal, law enforcement and military experience, including Hakeem Jeffries of New York, Sylvia Garcia of Texas, Val Demings of Florida, Jason Crow of Colorado and Zoe Lofgren of California.
The next phase of impeachment officially began after the articles were handed off to the Senate on Wednesday.
House Republican Liz Cheney attacked Pelosi and Democrats for being "giddy with excitement" about the signing and "making a mockery of their duty to the Constitution".
The House has named seven managers, who will serve as prosecutors in the trial.
The second article of impeachment relates to Trump's refusal to provide witnesses and documents to House impeachment investigators in defiance of congressional subpoenas.
Democrats will push to hear from witnesses during the trial.
House Speaker Nancy Pelosi said Trump had given the House no option.
"We don't think that there's going to be any need for witnesses in this trial", the official said.
The White House is steeling itself for a trial that could present damaging evidence against the USA leader on national television.
"I'm going to be going to Davos", Trump said following a ceremony honoring Religious Freedom Day. The outcome of this trial determines if Trump will be convicted and removed from office and, as a reminder, that requires a two-thirds majority vote - meaning all Democrats and at least 20 Republicans will have to vote together to remove him.
[V] oters disapprove of Speaker of the House Nancy Pelosi's decision to hold the articles of impeachment until she knew more about how the Senate would conduct the trial, as 44 percent approve and 48 percent disapprove.
However, "fifty-one senators will decide who to call", McConnell acknowledged Tuesday.
McConnell has resisted calling witnesses, saying that decision would come later in the trial.
The impeachment of President Donald Trump is now in the hands of the U.S. Senate. Furthermore, at least one GOP senator, Lindsey Graham from SC, threatened to change the rules to allow the Senate to proceed with the Democrats' impeachment trial against Donald Trump.
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