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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Collins, Susan M. [R-ME]* 03/10/2011
Sen. Carper, Thomas R. [D-DE]* 03/10/2011
Sen. Brown, Scott P. [R-MA]* 03/10/2011
Sen. McCain, John [R-AZ] 03/14/2011
Sen. Sanders, Bernard [I-VT] 03/28/2011
Sen. Tester, Jon [D-MT] 03/26/2012