I think I've made it pretty clear in the past that I'm not a big fan of John Yoo, to put it mildly.
Glenn Greenwald has a nice piece today on Yoo's take on executive privilege... then and now. The Reader's Digest version (without the right-wing slant, of course) is: against it for Clinton, for it for Bush.
This has always been my argument with supporters of the various statist and powerful executive powers claimed for Bush nowadays: change the name of the President to Clinton and tell me how much you support these powers then. It's pretty simple.