Robert Mueller’s Office Says Paul Manafort Violated Plea Deal By Lying |...

Manafort has already plead guilty to a number of state charges so no presidential pardon will help him now. Worse yet is that now that Mueller has stripped him of his last dime,  he doesn't want to challenge Mueller because if he wins things only get worse for him. He really doesn't want to wind up in a state prison where the staff is much less professional than Federal prison and the staff has wider digression when dealing with residents.