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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Collins, Susan M. [R-ME]* 04/17/2012
Sen. Levin, Carl [D-MI]* 04/17/2012
Sen. Lieberman, Joseph I. [ID-CT]* 04/17/2012
Sen. Carper, Thomas R. [D-DE]* 04/17/2012
Sen. Lautenberg, Frank R. [D-NJ]* 04/17/2012
Sen. Webb, Jim [D-VA]* 04/17/2012
Sen. Coons, Christopher A. [D-DE]* 04/17/2012
Sen. Brown, Scott P. [R-MA] 04/25/2012
Sen. Cardin, Benjamin L. [D-MD] 04/26/2012