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* = Original cosponsor
Cosponsor Date Cosponsored
Sen. Hagan, Kay [D-NC]* 03/13/2013
Sen. Hirono, Mazie K. [D-HI] 03/14/2013
Sen. Moran, Jerry [R-KS] 03/14/2013
Sen. Manchin, Joe, III [D-WV] 03/14/2013
Sen. Murphy, Christopher S. [D-CT] 03/18/2013
Sen. Landrieu, Mary L. [D-LA] 03/20/2013
Sen. Udall, Mark [D-CO] 03/20/2013
Sen. Wyden, Ron [D-OR] 03/20/2013
Sen. Coons, Christopher A. [D-DE] 03/20/2013
Sen. Collins, Susan M. [R-ME] 03/20/2013
Sen. Roberts, Pat [R-KS] 03/20/2013
Sen. Hoeven, John [R-ND] 03/20/2013
Sen. Vitter, David [R-LA] 03/20/2013
Sen. Johnson, Ron [R-WI] 03/20/2013
Sen. Heller, Dean [R-NV] 03/20/2013
Sen. Murkowski, Lisa [R-AK] 03/20/2013
Sen. Donnelly, Joe [D-IN] 03/20/2013
Sen. Johnson, Tim [D-SD] 03/20/2013
Sen. Nelson, Bill [D-FL] 03/20/2013
Sen. Ayotte, Kelly [R-NH] 03/20/2013
Sen. Baucus, Max [D-MT] 03/20/2013
Sen. Rockefeller, John D., IV [D-WV] 03/20/2013

Show cosponsors who withdrew