US Attorney General William Barr told ABC News on Thursday that President Donald Trump had never asked him to do anything in a criminal case but advised the president to stop tweeting about the Justice Department, saying it makes it “impossible for me to do my job.”

“I think it’s time to stop the tweeting about Department of Justice criminal cases,” Barr said. He added “the president has never asked me to do anything in a criminal case” but argued that having public statements and tweets made about the department, pending cases and its prosecutors “make it impossible to do my job and to assure the courts and the prosecutors in the department that we are doing our work with integrity.”