Trump impeachment trial live updates: Biden says charge 'not in dispute' in 1st comments on acquittal

The Senate has returned from a roughly one-hour recess after voting 55-45 to hear from witnesses in Trump's second impeachment trial.

Senate leaders were meeting during the break on drafting a resolution for calling witnesses following that unexpected vote. The resolution, ultimately, could call for no witnesses at all.

Before the chamber was gaveled back into session, Senate Majority Leader Chuck Schumer, Senate Majority Leader Mitch McConnell, House managers and Trump's defense team appeared to have an identical typed page -- with the parliamentarian studying the same sheet.

The decision to call witnesses revolves around the question of what Trump knew and when.

Lead impeachment manager Rep. Jamie Raskin, D-Md., had called to subpoena Rep. Jaime Herrera Beutler, R-Wash., who tweeted out a statement overnight reiterating comments she has made that House Minority Leader Kevin McCarthy tried to get Trump to call for a stop to the violence and that Trump told McCarthy, "'Well, Kevin, I guess these people are more upset about the election than you are.'"

Trump adviser Jason Miller has walked back and forth on Capitol Hill with a stack of papers he says is a witness list and has 301 names -- "SO FAR," the top page reads.

He told ABC News he’s not ready to share the whole thing yet because it’s a work in progress, but it signals Trump's team will match Democrats' call to have witnesses by potentially inundating the trial with them.

Miller's pacing comes as Republican Sen. Lindsey Graham has doubled down on his call for multiple witnesses -- if any are ultimately called with the resolution.

"It is my firm belief that the House Managers are trying to investigate the case AFTER it was brought to the Senate. It is better for the country to go to a final vote," Graham tweeted. "However, if the body wants witnesses, I am going to insist we have multiple witnesses."

Graham said the Senate could start with House Speaker Nancy Pelosi -- a sentiment floated by Trump defense attorney Michael van der Veen on the floor Saturday when he called for the trial to end "today."

The scramble for party leaders to work on a trial resolution for witnesses comes after the unexpected vote and call from House managers to subpoena Republican Rep. Jaime Herrera Beutler, who has said she has information on an intense call House Minority Leader Kevin McCarthy had with Trump during the Capitol attack, in which Trump sided with the mob while violence was underway.

-ABC News' Katherine Faulders and Allison Pecorin

After the Senate moved in a 55-45 vote to consider a resolution to call specific witnesses, Senate leaders are now meeting to draft that resolution.

According to sources, it should contain specific information on how the trial will move forward.

The resolution will be amendable, which means Republicans could offer endless amendments. Each amendment would get two hours of debate before a vote. Many want to avoid that situation, according to sources.

Sen. Chris Murphy, D-Conn., told ABC News the House managers could still decide to call no witnesses. In the end, the Senate will need to vote again on the resolution, which requires a simple majority vote to pass.

Lawmakers have begun to go back to their office building, so it appears the trial is in a holding pattern for some time.

-ABC News' Trish Turner

The Senate has called a recess until 12:30 p.m. as Senate leaders draft a resolution to call for witnesses in Trump's trial, following a 55-45 vote.

According to sources, the resolution -- which the Senate will need to vote on -- should contain specific information on how the trial will move forward.