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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Rockefeller, John D., IV [D-WV]* 04/25/2013
Sen. Thune, John [R-SD]* 04/25/2013
Sen. Udall, Mark [D-CO]* 04/25/2013
Sen. Risch, James E. [R-ID]* 04/25/2013
Sen. Hagan, Kay [D-NC]* 04/25/2013
Sen. Roberts, Pat [R-KS]* 04/25/2013
Sen. Isakson, Johnny [R-GA]* 04/25/2013
Sen. Toomey, Pat [R-PA]* 04/25/2013
Sen. McCaskill, Claire [D-MO]* 04/25/2013
Sen. Murkowski, Lisa [R-AK]* 04/25/2013
Sen. Warner, Mark R. [D-VA]* 04/25/2013
Sen. Chambliss, Saxby [R-GA]* 04/25/2013
Sen. Nelson, Bill [D-FL]* 04/25/2013
Sen. Begich, Mark [D-AK]* 04/25/2013
Sen. Heller, Dean [R-NV]* 04/25/2013