Longtime Trump adviser Roger Stone said he hasn’t spoken to Trump directly about his concerns but has gone on Fox News to convey them. Stone said he believes an interview could be a “setup” and that Trump should submit only written replies to questions.

“I understand this from the president’s point of view: He knows in his heart there is no Russian collusion and he has done nothing wrong,” Stone said. “However, Mueller is seeking to box him into some kind of process-related charge, either perjury or obstruction of justice in the matter of the termination of FBI Director James Comey or General Michael Flynn.”

Other advisers who have gone on television to warn Trump against an interview include former Speaker of the House Newt Gingrich, former New Jersey Governor Chris Christie, Fox News host and former district attorney Jeanine Pirro and Fox News host Sean Hannity.