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

Sen. John McCainJohn Sidney McCainTrump: McCain 'did the nation a tremendous disservice' with ObamaCare vote NBC's Kelly O'Donnell tears up over video celebrating 25 years at network Biden to appear on 'The View' for first interview on 2020 bid MORE (R-Ariz.) on Sunday praised special counsel Robert MuellerRobert (Bob) Swan MuellerSasse: US should applaud choice of Mueller to lead Russia probe MORE amid speculation that President TrumpDonald John TrumpPresenting the 2020 Democratic bracket The time has come for the Democrats to act, finally DHS expedites border wall replacement in Arizona, Texas 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 RosensteinThe time has come for the Democrats to act, finally Trump contradicts McGahn, says he didn't ask for Mueller's firing The Hill's Morning Report — Biden takes aim at Trump, early battlegrounds 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 ManafortHow the Obama White House engaged Ukraine to give Russia collusion narrative an early boost 21 questions for Robert Mueller Why did Mueller allow his investigation to continue for two years? MORE. He also filed charges against 13 Russians and three Russian organizations for allegedly interfering in the 2016 election.