Dem: 'Disheartening' that Republicans who 'stepped up' to defend Mueller are leaving

Rep. Mike QuigleyMichael (Mike) Bruce QuigleyDemocrats wary of Trump's 'erratic' approach to Iran Dems eye repeal of Justice rule barring presidential indictments Democrats lash out at Trump's bombshell remarks MORE (D-Ill.) said he is disheartened that Republican lawmakers who pushed to protect special counsel Robert MuellerRobert (Bob) Swan MuellerTop Republican considered Mueller subpoena to box in Democrats Kamala Harris says her Justice Dept would have 'no choice' but to prosecute Trump for obstruction Dem committees win new powers to investigate Trump MORE’s probe into possible collusion between Russia and the Trump campaign will be gone from the next Congress.

“What’s disheartening for me is that those who have stepped up, are those Republicans who are leaving,” Quigley said on CNN Tuesday, citing Sen. Jeff FlakeJeffrey (Jeff) Lane FlakeTrump says he's 'very happy' some GOP senators have 'gone on to greener pastures' Trump endorses McSally in Arizona Senate race Jeff Flake becoming Harvard fellow MORE (R-Ariz.) and the late Sen. John McCainJohn Sidney McCainTrump says he's 'very happy' some GOP senators have 'gone on to greener pastures' The Hill's Morning Report - Democratic debates: Miami nice or spice? Trump pick brings scrutiny to 'revolving door' between Pentagon, industry MORE (R-Ariz.) as examples of Republicans who voiced their disagreements with President TrumpDonald John Trump2020 Democrats spar over socialism ahead of first debate Senate passes .5 billion border bill, setting up fight with House 'Teflon Don' avoids the scorn of the 'family values' GOP — again MORE’s criticisms of Mueller.

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“This is the time to step up. This is the extraordinary period of our life where the rule of law and constitutional protections are at risk,” he added.

Quigley had been asked about a letter signed by 44 former senators calling on the Senate to defend democracy and warning that the country is entering a "dangerous period." They want lawmakers to pass legislation that would protect Mueller's probe.

Flake, along with Sens. Cory BookerCory Anthony BookerBooker calls for hearings on reports of ICE using solitary confinement Poll: Biden leads Democratic field by 6 points, Warren in second place The Hill's 12:30 Report: Anticipation high ahead of first debate MORE (D-N.J.) and Chris CoonsChristopher (Chris) Andrew CoonsDemocrats want White House hopefuls to cool it on Biden attacks Senators revive effort to create McCain human rights commission Senate Dem to reintroduce bill with new name after 'My Little Pony' confusion MORE (D-Del.) introduced a bill protecting Mueller from being unjustly fired, but Senate Majority Leader Mitch McConnellAddison (Mitch) Mitchell McConnellPelosi: Congress will receive election security briefing in July Adam Scott calls on McConnell to take down 'Parks & Rec' gif Trump says he spoke to Pelosi, McConnell on border package MORE (R-Ky.) has said the upper chamber will not take up the legislation. Many Republicans who have been vocal critics of Trump will be exiting the House and Senate after this term.

"I'll put it this way. The president has abused his power," Quigley told CNN. "We have seen detailed accounts of the Trump financial and political world forging ties with a foreign adversary for their own political and financial gain. I believe there has been an effort, a conspiracy to work with Russians toward that end.

"I believe the President of the United States obstructed this investigation and others joined in that obstruction and I believe my Republican counterparts were complicit in that obstruction," he added.

Trump lashed out again at the Mueller probe after new revelations.

Friday’s filings revealed that Trump personally directed former Trump attorney Michael Cohen to make payments to two women who alleged they had affairs with Trump. Those payments were determined earlier this year to have constituted campaign finance violations.

Mueller's team also said that former Trump campaign chairman Manafort lied to prosecutors about his contacts with the White House in violation of his plea agreement. 

Trump maintained that the filings “totally clears the President” and responded with a string of tweets in the following days ripping the Mueller investigation.

Updated at 10:53 a.m.