If you do not think that Bush's numbers being in the toilet (lower than Nixon's) have the GOP worried, then I would say you have your head in that same toilet as well. It's pretty much writing on the wall that if (or more accurately when) the Dems take Congress in 2006, Bush will find himself being impeached. And this time the neocons wont have Delay around to re-district.
And speaking of Delay, I don't think it matters if Scalia himself were presiding over his case. Delay's dead in the water, and the neo-cons don't want anything more to do with him. Same can be said with Libby, with Rove and Frist standing in the on deck circle.
And B. Boxer doesn't shake, unless she's got her hands around the neck of some neocon. Lieberman on the other hand...