McCain: Attacks on FBI 'serve no American interests'
© Greg Nash

Sen. John McCainJohn Sidney McCainGraham: McCain 'acted appropriately' by handing Steele dossier to FBI What should Democrats do next, after Mueller's report? Tom Daschle: McCain was a model to be emulated, not criticized MORE (R-Ariz.) fired back on Friday against growing criticism from President TrumpDonald John TrumpTrump: 'Haven't thought about' pardons for Mueller target Pence: Rocket attack 'proves that Hamas is not a partner for peace' Conservation remains a core conservative principle MORE and GOP lawmakers of the FBI, warning they are only bolstering Russian President Vladimir Putin. 

McCain's comments come as a controversial Republican memo accusing the Department of Justice and the FBI of "shocking" abuses of power is expected to be released shortly.  

"Elected officials, including the president, must stop looking at this [Russia] investigation through the warped lens of politics and manufacturing partisan sideshows," McCain said in a statement. 

He added that "the latest attacks on the FBI and Department of Justice serve no American interests — no party’s, no president’s, only Putin’s."

A White House spokesperson said on Friday that the president has approved the release of the memo, compiled for Rep. Devin NunesDevin Gerald NunesThe Hill's 12:30 Report: Trump, Dems eye next stage in Mueller fight Nunes on Mueller report: 'We can just burn it up' Nunes faces tough odds with Twitter lawsuit MORE (R-Calif.). The memo is said to contain allegations of the FBI improperly surveilling a Trump campaign aide's communications.

Trump has seized on the memo as evidence of bias in the top ranks of the intelligence community. 

"The top Leadership and Investigators of the FBI and the Justice Department have politicized the sacred investigative process in favor of Democrats and against Republicans — something which would have been unthinkable just a short time ago. Rank & File are great people," he said in a tweet. 

But McCain fired back on the GOP attacks, warning that the rhetoric is doing long-term damage to the country. 

"If we continue to undermine our own rule of law, we are doing Putin’s job for him," he said. 

He added: "While we have no evidence that these [Russian] efforts affected the outcome of our election, I fear they succeeded in fueling political discord and dividing us from one another."

GOP leadership has tried to separate the GOP-compiled memo from special counsel Robert MuellerRobert Swan MuellerSasse: US should applaud choice of Mueller to lead Russia probe MORE's investigation. 

"This memo is not an indictment of the FBI or the Justice Department. It does not impugn the Mueller investigation," House Speaker Paul RyanPaul Davis RyanFormer Dem candidate says he faced cultural barriers on the campaign trail because he is working-class Former House candidate and ex-ironworker says there is 'buyer's remorse' for Trump in Midwest Head of top hedge fund association to step down MORE (R-Wis.) told reporters on Thursday. 

But multiple sources told CNN that Trump believes the memo will help discredit the Russia investigation.