Trump's former White House Chief of Staff Mick Mulvaney said on CNN Thursday that only six or eight people could be the informant for the FBI on the former President. On Monday, former White House press secretary Stephanie Grisham said pretty much the same thing, noting that someone close to the twice impeached one-term President must be tipping off the FBI. "I didn't know there was a safe at Mar-a-Lago, and I was the chief of staff for 15 months," Mulvaney said.