Senators expect to receive the articles of impeachment against President Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE from Speaker Nancy Pelosi Nancy PelosiMcConnell focuses on confirming judicial nominees with COVID-19 talks stalled Overnight Defense: Top admiral says 'no condition' where US should conduct nuclear test 'at this time' | Intelligence chief says Congress will get some in-person election security briefings Pelosi must go — the House is in dire need of new leadership MORE (D-Calif.) on Wednesday and then to be sworn in as jurors on Thursday ahead of the Martin Luther King Jr. holiday weekend.

Pelosi says the House will vote Wednesday to send the two articles across the Capitol to begin the trial, and Senate rules require the trial to begin at 1 p.m. the day after the articles are presented to the chamber.

GOP leaders also hope to pivot on Thursday to votes on a bipartisan resolution to limit Trump’s ability to escalate hostilities with Iran and to approve the new U.S.-Mexico-Canada trade deal.

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It would, however, require cooperation from all 100 senators to complete action on the war powers resolution and the United States-Mexico-Canada Agreement (USMCA) this week.

“All that preliminary stuff could happen this week, we’re going to try to deal with war powers and USMCA this week, so I hope that there’s a window to do that. The sooner we get the articles, the more we can kind of do the formality-type stuff,” Senate Republican Whip John Thune John Randolph ThuneThe Hill's 12:30 Report - Presented by Facebook - Don't expect a government check anytime soon The Hill's Morning Report - Sponsored by The Air Line Pilots Association - Trump contradicts CDC director on vaccine, masks Senate GOP eyes early exit MORE (S.D.) said Tuesday.

“I suspect that what will happen is we’ll do the swearing in and all that [on Thursday] and probably start the trial next week,” Thune added.

The majority whip said whether the trial gets wrapped up by Trump’s State of the Union address, scheduled for Feb. 4, “depends entirely on what the Senate decides to do.”

He said if the Senate holds the trial six days a week, as required by the chamber’s rules, and moves quickly through the opening arguments of the House prosecutors and Trump’s defense team, it could finish the trial by the first week of February.

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But Thune acknowledged the Senate will vote on the question of calling witnesses such as former national security adviser John Bolton John BoltonDiplomacy with China is good for America The Hill's Morning Report - Sponsored by The Air Line Pilots Association - Pence lauds Harris as 'experienced debater'; Trump, Biden diverge over debate prep DOJ launches probe into Bolton book for possible classified information disclosures MORE, which could prolong the proceedings by another week or more.

“I think it’s going to depend, like I said, on 51 senators want to do at any point in time,” he added.

Senate leaders expect to observe Martin Luther King Jr. Day and not return to session until Tuesday of next week.

Thune said one possible scenario is for senators to be sworn in as jurors on Thursday “and then pivot to some of the other business with consent,” citing the war powers resolution and the trade deal.

A vote on the organizing resolution, which would set up time for the House impeachment managers and Trump’s defense team to present their opening arguments, as well as time for senators to ask questions in writing to Supreme Court Chief Justice John Roberts, will happen next week, Thune said.

The organizing resolution will not call for additional witnesses such as Bolton and acting White House chief of staff Mick Mulvaney Mick MulvaneyMick Mulvaney to start hedge fund Fauci says positive White House task force reports don't always match what he hears on the ground Bottom line MORE to testify, but will likely make it in order at a later date for the Senate to debate and vote on the issue.

Sen. Susan Collins Susan Margaret CollinsThe Hill's Campaign Report: Biden asks if public can trust vaccine from Trump ahead of Election Day | Oklahoma health officials raised red flags before Trump rally Gideon leads Collins by 12 points in Maine Senate race: poll Senate leaders quash talk of rank-and-file COVID-19 deal MORE (R-Maine) is negotiating with GOP colleagues to include a vote on witnesses in the organizing resolution.

Thune on Tuesday that several Republicans are interested in having witnesses.

"We're having conversations among our members are and we kind of know generally where most people are on some of those key issues," he said.

"This is sort of a fluid situation where we don't know exactly where people are going to be at the end of the opening arguments but I think people have expressed an interest" in hearing from witnesses, he added.

One scenario is for the Senate to vote on calling additional witnesses and then to consider separate motions on subpoenaing specific witnesses.

Sen. Rand Paul Randal (Rand) Howard PaulSecond GOP senator to quarantine after exposure to coronavirus GOP senator to quarantine after coronavirus exposure The Hill's Morning Report - Sponsored by National Industries for the Blind - Trump seeks to flip 'Rage' narrative; Dems block COVID-19 bill MORE (R-Ky.) has said if the Senate votes for witnesses, he will force a vote on calling Hunter Biden, former Vice President Joe Biden Joe BidenCast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response Biden tells CNN town hall that he has benefited from white privilege MORE’s son, to testify at the trial.