From Megan McCardle:

Incidentally, is anyone else amused by the lightening speed with which filibustering has gone from [undemocratic obstructionism/a vital institution for protecting minority interests] to [an important tool for preserving Federalism/an obscene mechanism for thwarting the clear Will of the People]? No one’s even bothered to come up with a better fig leaf than “but it’s different when my guys are in charge!