1. Ehud Olmert. If you don't know why it's probably not worth explaining. Plus he's Jerry Falwell's best friend until he has to choose between converting to Christianity and burning in hell for all eternity.
2. I hate to say it. John Murtha. Congressman, the last time YOU considered impeachment as just one more way to deal with a recalcitrant President was 1974. Give me a break. It's not, as you said to NPR, "one of the things that we always consider", but it is now, in large part because you decided to say the word. Thanks for the props, the blogosphere has been ahead of you for like, oh, three or four years at least, but please don't think you're fooling anybody that impeachment is just one more card you always have in your hand. It's the joker you are sneaking in the deck. Not that there's anything wrong with that.