Former Defense Secretary Robert Gates predicted this week that special counsel Robert MuellerRobert (Bob) Swan MuellerMueller report fades from political conversation Trump calls for probe of Obama book deal Democrats express private disappointment with Mueller testimony 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. 

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"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 TrumpSarah Huckabee Sanders becomes Fox News contributor The US-Iranian scuffle over a ship is a sideshow to events in the Gulf South Korea: US, North Korea to resume nuclear talks 'soon' MORE's inner circle. 

The special counsel's team has sat down with Trump's former chief of staff Reince PriebusReinhold (Reince) Richard PriebusTrump blasts Scaramucci as 'incapable' Trump taps Sean Spicer to join Naval Academy board of visitors Trump's no racist — he's an equal opportunity offender MORE, his former press secretary Sean SpicerSean Michael Spicer'Dancing with the Stars' host on casting political guests like Spicer: Will 'agree to disagree' The Hill's 12:30 Report: Trump rule marks major change in handling of migrant families Sean Spicer to compete on 'Dancing With the Stars' MORE and current White House communications director Hope HicksHope Charlotte HicksSarah Huckabee Sanders becomes Fox News contributor Hope Hicks defends accuracy of her congressional testimony Nadler subpoenas Lewandowski, former White House official for testimony 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."