Per Yahoo News:
Democratic Sens. Mark Begich of Alaska, Heidi Heitkamp of North Dakota, Mark Pryor of Arkansas and Max Baucus of Montana voted against it. (Sen. Harry Reid of Nevada switched his vote to no at the end, a procedural tactic that allows him to bring it up for a vote later.) In addition to Toomey, Republicans who supported the amendment were Sens. Mark Kirk of Illinois, Susan Collins of Maine and John McCain of Arizona.