Former White House chief strategist Steve Bannon is advising White House officials and congressional aides on a strategy designed to thwart special counsel Robert Mueller’s ongoing Russia investigation, according to a new report.

Bannon has suggested that President Trump first fire Deputy Attorney General Rod Rosenstein, who is overseeing Mueller’s probe. Trump is already reportedly weighing firing Rosenstein, after Rosenstein approved an FBI raid of the office and home of his personal lawyer, Michael Cohen, on Monday.