McCain: Mueller must be allowed to finish investigation 'unimpeded'

Sen. John McCainJohn Sidney McCainMellman: Where are good faith and integrity? GOP senator says Republicans didn't control Senate when they held majority Pence met with silence after mentioning Trump in Munich speech MORE (R-Ariz.) on Sunday praised special counsel Robert MuellerRobert Swan MuellerSasse: US should applaud choice of Mueller to lead Russia probe MORE amid speculation that President TrumpDonald John TrumpTrump nominates Jeffrey Rosen to replace Rosenstein at DOJ McCabe says ‘it’s possible’ Trump is a Russian asset McCabe: Trump ‘undermining the role of law enforcement’ MORE may be preparing to fire him. 

“Special Counsel Mueller has served our country with honesty and integrity. It’s critical he be allowed to complete a thorough investigation into Russia’s interference in the 2016 election — unimpeded,” McCain tweeted.

Trump has at various times this weekend lashed out at the FBI, Department of Justice and Mueller probe, prompting speculation he might call for Mueller's firing.

ADVERTISEMENT

On Saturday, he asserted that Mueller's investigation should never have been opened in the first place. On Sunday, he attacked the makeup of Mueller's team, claiming it is unfairly stacked with Democrats. Mueller himself is a Republican.

The tweets came shortly after Trump's lawyer, John Dowd, called on Deputy Attorney General Rod RosensteinRod Jay RosensteinTrump nominates Jeffrey Rosen to replace Rosenstein at DOJ McCabe says ‘it’s possible’ Trump is a Russian asset McCabe: Trump ‘undermining the role of law enforcement’ MORE, who oversees Mueller's investigation, to shut down the probe.

On Sunday, lawmakers from both sides of the aisle warned Trump against firing the special counsel. Sen. Lindsey Graham (R-S.C.) suggested such an action would be "the beginning of the end" of Trump's presidency.

Mueller has obtained guilty pleas from three former Trump associates, and indicted former Trump campaign chairman Paul ManafortPaul John ManafortTrump has publicly criticized Russia probe more than 1,100 times: NY Times Judge orders Stone to appear in court after he shared photo of her with crosshairs Roger Stone shares, quickly deletes Instagram photo of federal judge on his case MORE. He also filed charges against 13 Russians and three Russian organizations for allegedly interfering in the 2016 election.