Glenn Greenwald has a list of them and some of them are pretty funny. He includes one from 2006 from the terminally invertebrate Arlen Specter:
“What the bill seeks to do is set back basic rights by some 900 years” —
Sen. Arlen Specter on the Military Commissions Act, in a speech he delivered on the Senate floor almost immediately before voting in favor of that bill (that was actually from September, 2006, but I cheated and included it anyway because it’s my all-time favorite political quote).
That quote tells you everything you need to know about Specter.