GOP senators say that if the House passes articles of impeachment against President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE they will quickly quash them in the Senate, where Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellFEC flags McConnell campaign over suspected accounting errors Poll: 59 percent think president elected in November should name next Supreme Court justice Mark Kelly: Arizona Senate race winner should be sworn in 'promptly' MORE (R-Ky.) has broad authority to set the parameters of a trial.

While McConnell is required to act on articles of impeachment, which require 67 votes — or a two-thirds majority — to convict the president, he and his Republican colleagues have the power to set the rules and ensure the briefest of trials.

“I think it would be disposed of very quickly,” said Senate Judiciary Committee Chairman Lindsey Graham Lindsey Olin GrahamSenate GOP aims to confirm Trump court pick by Oct. 29: report The Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting Senate GOP sees early Supreme Court vote as political booster shot MORE (R-S.C.).

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“If it’s based on the Mueller report, or anything like that, it would be quickly disposed of,” he added.

Sen. John Cornyn John CornynThe Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting Liberal super PAC launches ads targeting vulnerable GOP senators over SCOTUS fight Senate GOP faces pivotal moment on pick for Supreme Court MORE (R-Texas), an adviser to McConnell’s leadership team, said “nothing” would come of impeachment articles passed by the House.

Given the Senate GOP firewall, Cornyn, who’s also a member of the Judiciary Committee, said he doubts that Democrats will commence the impeachment process.

“It would be defeated. That’s why all they want to do is talk about it,” he said. “They know what the outcome would be.”

Republicans hold a 53-47 majority in the chamber, and Vice President Pence would cast the tie-breaking vote if necessary.

Senate Republicans say that an impeachment trial would be given the bare minimum amount of floor time.

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“Why on earth would we give a platform to something that I judge as a purely political exercise?” said Sen. Thom Tillis Thomas (Thom) Roland TillisThe Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting OVERNIGHT ENERGY: EPA head questions connection of climate change to natural disasters | Pebble Mine executives eye future expansion in recorded conversations | EPA questions science linking widely used pesticide to brain damage in children Liberal super PAC launches ads targeting vulnerable GOP senators over SCOTUS fight MORE (R-N.C.), another member of the Judiciary Committee. “We have to perform our constitutional duty, but if people think that we’re going to try and create a theater that could give you the perception that this is a matter that rises to the level of Watergate, that’s nonsense.”

Tillis said he would support McConnell bringing the impeachment process to a quick close, and that any kind of extended trial would be “rewarding what I view as bad behavior on the part of the House.”

Tillis, who is up for reelection next year, said many independents and moderates in his state are tired of impeachment talk.

National polls show that fewer than 40 percent of Americans support impeachment proceedings against Trump, while the majority oppose them.

McConnell would have broad authority to determine how a Senate trial would play out. He could stifle the arguments of Democratic prosecutors from the House as long as he’s backed up by his fellow GOP senators.

Supreme Court Chief Justice John Roberts would preside over a Senate trial, but he would be constrained by the rules and traditions of the Senate, where the majority leader sets the schedule and has the right of first recognition.

Under the Senate manual’s rules for impeachment trials, the presiding officer — likely Roberts — would rule on all questions of evidence, but any senator could ask for a formal vote to appeal a decision. Under the Senate rules, it takes a majority to sustain or overrule a ruling from the presiding officer.

Democrats would need to persuade at least four Republicans to break with McConnell in order to bring in any witnesses or exhibits he decides to block.

That would mean winning over moderates like Sens. Lisa Murkowski Lisa Ann MurkowskiClub for Growth to spend million in ads for Trump Supreme Court nominee Pebble Mine CEO resigns over secretly recorded comments about government officials Maryland's GOP governor says Republicans shouldn't rush SCOTUS vote before election MORE (Alaska) and Susan Collins Susan Margaret CollinsClub for Growth to spend million in ads for Trump Supreme Court nominee Maryland's GOP governor says Republicans shouldn't rush SCOTUS vote before election The Hill's Morning Report - Sponsored by Facebook - GOP closes ranks to fill SCOTUS vacancy by November MORE (Maine) or vulnerable senators in swing states, namely Sens. Cory Gardner Cory Scott GardnerCook Political Report shifts Colorado Senate race toward Democrat Overnight Health Care: US coronavirus deaths hit 200,000 | Ginsburg's death puts future of ObamaCare at risk | Federal panel delays vote on initial COVID-19 vaccine distribution The Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting MORE (Colo.) and Martha McSally Martha Elizabeth McSallyThe Hill's Campaign Report: Presidential polls tighten weeks out from Election Day Mark Kelly: Arizona Senate race winner should be sworn in 'promptly' New ABC/WaPost poll finds Trump edging Biden in Arizona, Florida MORE (Ariz.).

Murkowski told The Hill on Thursday that she hasn’t given much thought as to how a Senate trial might play out.

Democrats, however, are skeptical they would get much, if any, Republican support to overrule McConnell.

“There are 47 Democrats. On a good day, even when the president is at his most outrageous level, only three Republican senators will publicly say so,” said Senate Democratic Whip Dick Durbin Richard (Dick) Joseph DurbinFeinstein 'surprised and taken aback' by suggestion she's not up for Supreme Court fight Grand jury charges no officers in Breonna Taylor death Democrats shoot down talk of expanding Supreme Court MORE (Ill.).

Former Sen. Trent Lott (R-Miss.), who was the majority leader when the Senate acted on articles of impeachment against former President Clinton, said he had broad power to shape the debate, which he wanted to keep short, knowing that it was politically unpopular.

“Some people wanted to bring Monica Lewinsky into the well of the Senate and take her statement in front of the whole Senate, and I said, ‘We’re not going to do that. As long as I’m the majority leader of the United States Senate, we’re not going to be talking about a stain on a blue dress in the well of this chamber.’ So we didn’t do it,” he said.

“Then they wanted to bring in Clinton’s appointments secretary, [Betty Currie]. I said, ‘We’re not going to do it.' We didn’t do it,” he added.

Lott said he was under pressure from House Republicans at the time to extend the trial by allowing multiple exhibits and witnesses, but he resisted knowing he wouldn’t get enough Democrats to convict Clinton on any counts.

“Some of the House people always felt like I could have gotten him removed if I really wanted to,” he said. “I wasn’t ever going to have the votes. So the question was: How do we do it with dignity to get it to a conclusion?”

Lott said he could have “pretty much” done whatever he wanted to set the trial’s procedure, as long as he had the votes to sustain his decisions.

He said he initially wanted Clinton’s trial to be shorter but had to ditch an even-more truncated schedule than what was eventually agreed to because of the objections of conservatives like former Sens. Rick Santorum (Pa.), Phil Gramm (Texas) and Don Nickles (Okla.), who wanted a more-thorough review of the charges.

And even though he only needed simple-majority votes to back up his decisions on the schedule, he circumvented a drawn-out battle over process by striking an agreement with then-Senate Minority Leader Tom Daschle (D-S.D.).

“I kept Tom Daschle informed of every step and basically had his acquiescence,” Lott said, adding “we had an agreement” on how to proceed.