Guy --
I'm sorry. I can't find another way to rein these guys in. They refuse to recognize any limits on their power to do whatever they want; I'd argue that adopting John Yoo's theories on that power and putting those theories into practice is, in and of itself, an impeachable offense based on the standards set by the Founders at the Philadelphia convention, but let's leave that aside. Let's even leave aside the impeachable (to me) notion of transforming the DOJ into a partisan hit squad, and of playing fast and loose with classified material and then using the commutation power to short-circuit further investigation. They resist, in all cases, legitimate congressional oversight of their activities. They simply ignore laws passed of which they don't approve, or they hide behind the fig leaves of "signing statements," which they use to aggrandize their own power. They make claims of executive privilege far beyond those ever asserted by any other president, or recognized by any court (see: US v. Nixon). And that's only the stuff we know about. For example, I'lll bet all the money in my wallet against all the money in yours that they used the clearly illegal NSA wiretapping to go after their political opponents.
And, not for nothing, but every poll I've seen shows a greater support for impeaching these guys than ever was there for impeaching Bill Clinton.
They do not respond to the Congress, to the courts, or to the people themselves, and they simply refuse to cooperate with any other avenue of remedy, preferring, instead, to kick the can down the road until they're out of office, leaving behind a defaced Constitution and a debased Republic. What else is left?