Former Defense Secretary Robert Gates predicted this week that special counsel Robert MuellerRobert (Bob) MuellerSenate Democrats urge Garland not to fight court order to release Trump obstruction memo Why a special counsel is guaranteed if Biden chooses Yates, Cuomo or Jones as AG Barr taps attorney investigating Russia probe origins as special counsel 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 TrumpRealClearPolitics reporter says Freedom Caucus shows how much GOP changed under Trump Jake Ellzey defeats Trump-backed candidate in Texas House runoff DOJ declines to back Mo Brooks's defense against Swalwell's Capitol riot lawsuit MORE's inner circle. 

The special counsel's team has sat down with Trump's former chief of staff Reince PriebusReinhold (Reince) Richard PriebusEx-Sen. Cory Gardner joins lobbying firm Democrats claim vindication, GOP cries witch hunt as McGahn finally testifies Biden's is not a leaky ship of state — not yet MORE, his former press secretary Sean SpicerSean Michael SpicerDeSantis to hold Newsmax town hall Biden's poor TV ratings against Trump is exactly what this administration wants Overnight Health Care: CDC director calls on Michigan to 'close things down' amid surge in cases | Regeneron says antibody therapy prevents COVID-19 infections MORE and current White House communications director Hope HicksHope HicksUPDATED: McEnany, Fox News talks on pause Trump selects Hicks, Bondi, Grenell and other allies for positions Trump lawyer Jenna Ellis tests positive for coronavirus 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."