Matthew Whitaker, whom President Donald Trump named as his acting attorney general on Wednesday, privately provided advice to the president last year on how the White House might be able to pressure the Justice Department to investigate the president’s political adversaries, Vox has learned.

First he went after the prosecutors who recommended a multiyear sentence for his friend Roger Stone. Then President Trump turned his Twitter ire to the “witch hunt disgrace” of special counsel Robert S. Mueller III’s investigation, which led to Stone’s indictment. But perhaps most surprising was Trump’s decision to target U.S. District Judge Amy Berman Jackson — who will determine Stone’s fate when he appears in her courtroom next Thursday.