Former Defense Secretary Robert Gates predicted this week that special counsel Robert MuellerRobert Swan MuellerSasse: US should applaud choice of Mueller to lead Russia probe MORE's conclusions in the Russia probe could "elate" some people while angering others. 

"People need to be prepared that a guy like Bob Mueller may come to a different conclusion that will elate some people and anger some people," Gates told NBC's “Meet the Press” in an interview airing on Sunday. 

Gates, who served under former Presidents George W. Bush and Obama, expressed his confidence in Mueller as head of the investigation. 

ADVERTISEMENT

"The Bob Mueller I know is a man of extraordinary integrity and character. I can't think of anybody who would do a more honest and stand-up job of conducting an investigation. And, you know, people need to be prepared, people are assuming he's going to come to one conclusion," he said. 

Mueller's probe has moved closer into President TrumpDonald John TrumpImpeachment? Not so fast without missing element of criminal intent Feds say marijuana ties could prevent immigrants from getting US citizenship Trump approval drops to 2019 low after Mueller report's release: poll MORE's inner circle. 

The special counsel's team has sat down with Trump's former chief of staff Reince PriebusReinhold (Reince) Richard PriebusThe Memo: Mueller's depictions will fuel Trump angst Trump: Some statements about him in Mueller report are 'total bulls---' Mueller report shows how Trump aides sought to protect him and themselves MORE, his former press secretary Sean SpicerSean Michael SpicerFormer White House aide who mocked McCain joins pro-Trump super PAC Former Auburn coach to run for Senate in Alabama Five things we know about Dems' sprawling Trump probe MORE and current White House communications director Hope HicksHope Charlotte HicksTrump feared Mueller's appointment: 'This is the end of my Presidency' Investigators in Trump hush money probe interviewed Hicks, security chief: report The Hill's 12:30 Report — Presented by Kidney Care Partners — House Dems flex subpoena powers MORE

Mueller is set to interview Trump's former chief strategist, Stephen Bannon, next week. 

Trump himself has said he is looking forward to talking with Mueller, however, The New York Times reported Thursday that the president attempted to fire Mueller last June, but backed off after White House counsel Don McGahn refused Trump’s order and threatened to quit.

The president called the reports "fake news."