WATCH: Steve Bannon Declares 'War' on All 2018 Senate Incumbents Except Cruz
Breitbart executive and former White House strategist Steve Bannon ripped Sen. Bob Corker (R-Tenn.) and the Republican establishment for actively working against President Trump.
Corker engaged in a war of words with Trump over his foreign policy, asking whether someone "missed their shift" at the White House, which he referred to as a day care center.
"I don't wish him harm. Just, the volatility is, you know, to anyone who has been around him, is to a degree, alarming," Corker said.
"This is what they think about President Trump behind closed doors," Bannon said. "It's totally unacceptable."
Bannon said that Corker, who recently announced his retirement from Congress, is one of only a few of the "globalists" in the GOP who publicly criticized Trump.
He said there are only a handful of senators who support Trump, and that he intends to bankroll primary opponents to every 2018 Republican senator except Ted Cruz of Texas.
Bannon said he is already in the advanced stages of recruiting opponents for Sens. Roger Wicker of Mississippi and Orrin Hatch of Utah.
"[Corker] doesn't have the guts to get back in the  race," he said, predicting that the former Chattanooga mayor would be easily defeated by Trump-supporting Rep. Marsha Blackburn (R-Tenn.).
"He got out because he saw what happened in Alabama," Bannon said of populist Judge Roy Moore's victory over McConnell-backed Sen. Luther Strange (R-Ala.).
Bannon said that Republicans should also be conscious of the "economic hate crimes" the federal government has carried out against working people.
Watch more above.