Senators who crossed party lines on background check vote

The following is a list of lawmakers who crossed party lines on the "Manchin-Toomey amendment," the proposal to expand background checks to Internet sales and gun shows. The amendment failed in the Senate Wednesday on a 54-46 vote.

Republicans who defected and voted "yes":

Pennsylvania Sen. Pat Toomey

Illinois Sen. Mark Kirk

Maine Sen. Susan Collins

Arizona Sen. John McCain

Democrats who defected and voted "no":

North Dakota Sen. Heidi Heitkamp

Arkansas Sen. Mark Pryor

Alaska Sen. Mark Begich

Montana Sen. Max Baucus

Nevada Sen. Harry Reid (Reid only voted no for procedural reasons, so that Democrats can call up the provision later on)