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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Grassley, Chuck [R-IA]* 03/15/2012
Sen. Bennet, Michael F. [D-CO]* 03/15/2012
Sen. Kohl, Herb [D-WI]* 03/15/2012
Sen. Blumenthal, Richard [D-CT] 03/20/2012