According to The Associated Press, after the House officially votes to send the articles to the Senate, the entire prosecution team will line up behind House Sergeant-at-Arms Paul Irving and House Clerk Cheryl Johnson, who will be holding the articles. The procession will walk, two by two, through National Statuary Hall, past Pelosi’s office, across the Rotunda and to the doors of the Senate. The articles will be handed to Secretary of the Senate Julie E. Adams.
The Senate is expected to transform into an impeachment court as early as Thursday, but Senate Majority Leader Mitch McConnell says he expects the trail to start in earnest on Tuesday.
The Constitution calls for the Chief Justice of the Supreme Court, in this case John Roberts, to preside over all 100 senators who serve as jurors. The senators will have to swear an oath to deliver "impartial justice" -- something that has come under scrutiny after McConnell said publicly last month "I'm not impartial about this at all.”
McConnell also said he is coordinating with White House counsel -- the lawyers who will defend Trump -- on how to proceed.
Arguments are expected to begin Tuesday. The trial will go six days a week with Sundays off, according to Senate rules. But the Senate can vote to change the rules. The trial rules also state that senators must stay off their phones.
Two-thirds of the senators are needed to find Trump guilty to convict him and remove him from office, but it's expected he won't get close to the 67 votes needed. McConnell also stated as much last month.
But for most things related to the trial, only 51 votes are needed. That includes the calling of witnesses or potentially dismissing the trial altogether.
There are enough Republican senators who have indicated they will not be in favor of dismissing the trial, but it remains to be seen if any witnesses will be called. Former national security adviser John Bolton has said he will testify if subpoenaed.
There are four Republican senators and four Democratic senators in particular to keep an eye on.
On the GOP side, they are Susan Collins of Maine, Mitt Romney of Utah, Lisa Murkowski of Alaska and Lamar Alexander of Tennessee. A 51-vote majority is needed to approve the calling of witnesses. If all Democrats and independents vote in favor, they need four Republicans to come over. These are the most likely ones.
On the Democratic side, the ones to watch are presidential candidates Elizabeth Warren of Massachusetts, Bernie Sanders of Vermont, Amy Klobuchar of Minnesota and Michael Bennet of Colorado. They are required to be at the trial, which means they will be taken off the campaign trail less than two weeks before the first primary votes are cast in the Iowa caucuses. Sanders and Warren are among the four front runners in the most recent Iowa polls. Klobuchar is trailing them and Bennet is barely registering in any state or national polls.