As you've undoubtedly heard, Deadeye Dick Cheney has now proclaimed that he is NOT, despite what you have heard and the text of the Constitution, a member of the Executive Branch. (Maureen Dowd had a wonderful analysis of this yesterday.)
There's an old adage in law that you can't have it both ways. That's lawyer talk for what's sauce for the goose is sauce for the gander. Put still another way, if Deadeye Dick is not a member of the Executive Branch, then he doesn't get to claim executive privilege, and Congress can call him in to spill the beans about everything from his energy task force to deliberations about Iraq and the shenanigans at the Justice Department.
Cheney has really gone off the deep end here. If this is an example of the way his mind is working now, he should be removed from office on the ground of mental incompetence.
TONE has advocated impeaching the President, but in his lame-duckiness it's clear that that isn't going to happen. The Vice-President is different however. The administration has 19 months left in office. That's plenty of time to put Deadeye Dick in the dock.