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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Cardin, Benjamin L. [D-MD]* 03/31/2011
Sen. Klobuchar, Amy [D-MN]* 03/31/2011
Sen. Inhofe, James M. [R-OK]* 03/31/2011
Sen. Lautenberg, Frank R. [D-NJ] 04/13/2011
Sen. Boxer, Barbara [D-CA] 08/02/2011