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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Collins, Susan M. [R-ME]* 03/21/2012
Sen. Carper, Thomas R. [D-DE]* 03/21/2012
Sen. McCain, John [R-AZ]* 03/21/2012
Sen. Brown, Scott P. [R-MA]* 03/21/2012