Senate 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.) on Monday hit back at calls from some Democrats to start impeachment proceedings 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, saying it's "time to move on."

"Well, look, I think it's time to move on. This investigation was about collusion, there's no collusion, no charges brought against the president on anything else, and I think the American people have had quite enough of it," McConnell told reporters in Kentucky, according to NBC News.

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McConnell is one of 14 GOP senators, some of whom were members of the House at the time, who in 1998 either voted to either impeach or convict then-President Clinton on obstruction charges.

Impeachment proceedings would have to be initiated in the House. If the lower chamber passes impeachment articles against a president, a trial would then be held in the Senate, which has successfully never voted to remove a president from office.

McConnell's comments come as special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE's report on his two-year probe into Russia's election interference in the 2016 election and the Trump campaign has sparked new impeachment calls from some Democratic lawmakers.

Sen. Elizabeth Warren Elizabeth WarrenDimon: Wealth tax 'almost impossible to do' CNN's Don Lemon: 'Blow up the entire system' remark taken out of context Democrats shoot down talk of expanding Supreme Court MORE (D-Mass.) became the first of several 2020 presidential hopefuls in the Senate to call for the House to start impeachment trials, writing in a tweet late last week that "the severity of this misconduct demands that elected officials in both parties set aside political considerations and do their constitutional duty."

But Democrats are struggling to find a unified front on how they are answering the impeachment question. House Democrats are scheduled to hold a phone call later Monday to talk about their next steps after the release of the redacted Mueller report.

Speaker Nancy Pelosi Nancy PelosiHoyer: House should vote on COVID-19 aid — with or without a bipartisan deal Ruth Bader Ginsburg lies in repose at Supreme Court McCarthy threatens motion to oust Pelosi if she moves forward with impeachment MORE (D-Calif.) sent a letter to the members of her caucus acknowledging the different opinions about how to respond to Mueller's findings.

"While our views range from proceeding to investigate the findings of the Mueller report or proceeding directly to impeachment, we all firmly agree that we should proceed down a path of finding the truth," Pelosi wrote.

"It is also important to know that the facts regarding holding the President accountable can be gained outside of impeachment hearings," she added.

Trump brushed off a question about impeachment on Monday, telling reporters at the White House's annual Easter egg roll that he was "not even a little bit" worried.