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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Grassley, Chuck [R-IA] 05/06/2009
Sen. Lugar, Richard G. [R-IN] 05/14/2009
Sen. Johanns, Mike [R-NE] 05/21/2009
Sen. Cochran, Thad [R-MS] 06/08/2009