As my colleague Josh Kraushaar noted earlier, only one Republican facing a tough re-election bid voted against the moratorium: Indiana Sen. Richard Lugar (R). Lugar's brand of moderate Republicanism has already sparked challenges from the right. The other Democrats who supported the earmark moratorium included Sens. Evan Bayh (D-Ind.) -- who is retiring -- and Russ Feingold (D-Wis.) -- who lost re-election this year. The others also came from swing states but are not up for re-election in 2012. They are Sens. Mark Udall (D-Colo.), Michael Bennet (D-Colo.) and Warner. Updated, 6 p.m. with McCaskill's background on earmarks.