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* = Original cosponsor

Cosponsor Date Cosponsored
Sen. Snowe, Olympia J. [R-ME]* 03/15/2012
Sen. Durbin, Richard [D-IL]* 03/15/2012
Sen. Whitehouse, Sheldon [D-RI]* 03/15/2012
Sen. Lieberman, Joseph I. [ID-CT]* 03/15/2012
Sen. Johnson, Tim [D-SD]* 03/15/2012
Sen. Carper, Thomas R. [D-DE]* 03/15/2012
Sen. Kohl, Herb [D-WI]* 03/15/2012
Sen. Brown, Sherrod [D-OH]* 03/15/2012
Sen. Inouye, Daniel K. [D-HI]* 03/15/2012
Sen. Shaheen, Jeanne [D-NH]* 03/15/2012
Sen. Cardin, Benjamin L. [D-MD]* 03/15/2012
Sen. Casey, Robert P., Jr. [D-PA]* 03/15/2012
Sen. Levin, Carl [D-MI]* 03/15/2012
Sen. Reed, Jack [D-RI]* 03/15/2012
Sen. Nelson, Bill [D-FL]* 03/15/2012
Sen. Rockefeller, John D., IV [D-WV]* 03/15/2012
Sen. Lautenberg, Frank R. [D-NJ]* 03/15/2012
Sen. Boxer, Barbara [D-CA]* 03/15/2012
Sen. Feinstein, Dianne [D-CA]* 03/15/2012
Sen. Wyden, Ron [D-OR]* 03/15/2012
Sen. Lugar, Richard G. [R-IN]* 03/15/2012
Sen. Collins, Susan M. [R-ME]* 03/15/2012
Sen. Cochran, Thad [R-MS]* 03/15/2012
Sen. Coburn, Tom [R-OK]* 03/15/2012
Sen. Isakson, Johnny [R-GA]* 03/15/2012
Sen. Kirk, Mark Steven [R-IL]* 03/15/2012
Sen. Chambliss, Saxby [R-GA]* 03/15/2012