Just a reminder. Once someone has been pardoned, they can not use the 5th amendment to hide behind as a method to dodge questions if they are in court or in Congress being questioned.
They can be used to prosecute crimes of others, sure. If he was an accessory to murder and pardoned, he'd have to spill the beans on the trigger man.
Im not sure i read it that way. I read it as a person cannot be pardoned from impeachment. A person can not become unimpeachable, by pardoned or any other reason.
Lincoln did this literally hundreds if not thousands of times.
Who's he gonna pick for ATF?
Trumps ATF pick: umm my agency is unconstitutional. We are closing shop immediately.