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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Cantwell, Maria [D-WA]* 04/20/2009
Sen. Lieberman, Joseph I. [ID-CT]* 04/20/2009
Sen. Collins, Susan M. [R-ME]* 04/20/2009
Sen. Thune, John [R-SD]* 04/20/2009
Sen. Klobuchar, Amy [D-MN]* 04/20/2009
Sen. Grassley, Chuck [R-IA] 04/28/2009