Here's what happens next on impeachment

Here's what happens next on impeachment
© Greg Nash

Senate GOP leaders say opening arguments in the impeachment trial for President TrumpDonald John TrumpKaine: Obama called Trump a 'fascist' during 2016 campaign Kaine: GOP senators should 'at least' treat Trump trial with seriousness of traffic court Louise Linton, wife of Mnuchin, deletes Instagram post in support of Greta Thunberg MORE will likely kick off early next week. But several procedural steps need to happen before the meat of the trial begins.

Here’s what to watch for in the coming days as the impeachment process finally shifts from the House to the Senate.

The action starts Tuesday. Speaker Nancy PelosiNancy PelosiClinton says Zuckerberg has 'authoritarian' views on misinformation Trump defense team signals focus on Schiff Trump legal team offers brisk opening defense of president MORE (D-Calif.) will huddle with her rank-and-file Democrats on Tuesday morning to discuss “how we proceed further” on sending the pair of impeachment articles to the Senate. 

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Pelosi hasn’t publicly stated when exactly the House will vote, but the expectation is the vote on the resolution naming impeachment managers and shipping articles to the Senate will take place Wednesday or Thursday. That’s before the House departs for its weeklong recess in honor of Martin Luther King Jr.

Before that House vote, Pelosi and House Intelligence Committee Chairman Adam SchiffAdam Bennett SchiffSunday shows preview: Lawmakers prepare for week two of impeachment trial Trump defense team signals focus on Schiff Schiff pushes back: Defense team knows Trump is guilty MORE (D-Calif.) also could decide to publish dozens of documents, recordings, photos and text messages from Lev Parnas, a Rudy GiulianiRudy GiulianiDemocrats see Mulvaney as smoking gun witness at Trump trial Pompeo lashes out at 'shameful' NPR reporter Trump legal team launches impeachment defense MORE business associate, that may be relevant to the impeachment trial. The move to publish could up the ante for Senate Republicans as they debate whether to call witnesses in the trial.

After the House vote, it’s the Senate’s turn. Once the House formally names its House managers — Democratic prosecutors handpicked by Pelosi — the Senate must then pass a resolution informing the House it’s ready to receive the articles of impeachment.

After that happens, Pelosi’s impeachment managers — there were 13 GOP managers for the Bill ClintonWilliam (Bill) Jefferson ClintonGeorge Conway: Witness missing from impeachment trial is Trump Is Donald Trump one of the smartest presidents in US history? Trump impeachment and trial: All parties should feel ashamed MORE impeachment trial in 1999 — will physically deliver the articles from the House chamber, through Statuary Hall and the Capitol Rotunda, to the Senate chamber. 

The “march” will take about a minute and a half. Among those who could be named managers and make that historic march across the Capitol: Schiff and Judiciary Chairman Jerrold NadlerJerrold (Jerry) Lewis NadlerTrump defense team signals focus on Schiff Impeachment has been a dud for Democrats Nadler calls Trump a 'dictator' on Senate floor MORE (D-N.Y.) as well as House Democratic Caucus Chairman Hakeem JeffriesHakeem Sekou JeffriesJeffries, Nadler showcase different NY styles in Trump trial Hakeem Jeffries tells Senate in impeachment proceedings they should subpoena Baseball Hall of Fame after Jeter vote Video becomes vital part of Democrats' case against Trump MORE (D-N.Y.) and Rep. Jamie RaskinJamin (Jamie) Ben RaskinHouse Oversight committee asks DHS for information on family separation Maryland Rep. Raskin endorses Warren ahead of Iowa caucus Congressional Progressive Caucus co-chair Jayapal endorses Sanders MORE (D-Md.), a former constitutional law professor.

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Next, the Senate will need to take up an impeachment rules package. What’s unclear right now is whether the resolution governing the rules and procedures of the Trump impeachment trial will allow senators to call witnesses such as former White House national security adviser John BoltonJohn BoltonRomney: 'It's very likely I'll be in favor of witnesses' in Trump impeachment trial George Conway: Witness missing from impeachment trial is Trump Democrats see Mulvaney as smoking gun witness at Trump trial MORE later in the process. 

Moderate Sen. Susan CollinsSusan Margaret CollinsKaine: GOP senators should 'at least' treat Trump trial with seriousness of traffic court Romney: 'It's very likely I'll be in favor of witnesses' in Trump impeachment trial Schumer: Trump's team made case for new witnesses 'even stronger' MORE (R-Maine) said she is working with “a small group” of GOP colleagues on a plan to at least give the Senate the option to have witness testimony in the trial phase. But Senate Majority Leader Mitch McConnellAddison (Mitch) Mitchell McConnellSchumer: Trump's team made case for new witnesses 'even stronger' Trump, Democrats risk unintended consequences with impeachment arguments CNN's Axelrod says impeachment didn't come up until 80 minutes into focus group MORE (R-Ky.) has said he sees no need for witnesses and has been pushing for a swift acquittal of the president.

Senate GOP leaders said they are expecting their rules package to be finalized soon.

There are other housekeeping matters, too. Under the chamber’s rules, each of the 100 senators who will ultimately decide whether to convict or acquit Trump will raise their hand and take a special impeachment oath to “do impartial justice according to the Constitution and laws: So help me God.” That image could make for poor optics for some GOP senators who have already said they will vote to acquit Trump before hearing any evidence.

The Senate will also need to notify Trump’s defense team and summon Chief Justice John Roberts to preside over the Trump impeachment trial. That avoids a conflict of interest for Vice President Mike PenceMichael (Mike) Richard PenceFour endings to the Senate's impeachment trial — and none is good for Democrats Jeffries, Nadler showcase different NY styles in Trump trial Pence meets with Pope Francis at the Vatican MORE, the president of the Senate, who would succeed Trump in the event he is found guilty of the impeachment charges.

Formal arguments could start as early as Jan. 21. Sen. John CornynJohn CornynTrump legal team offers brisk opening defense of president Nadler gets under GOP's skin Restlessness, light rule-breaking and milk spotted on Senate floor as impeachment trial rolls on MORE (R-Texas), a member of GOP leadership and a close McConnell adviser, told reporters on Monday that opening arguments from the Pelosi impeachment managers and Trump defense team could come a week from Tuesday, which would be a day after the MLK federal holiday.

That is "what it's feeling like," Cornyn said.

Jordain Carney contributed.