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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Hoeven, John [R-ND]* 02/13/2012
Sen. Lugar, Richard G. [R-IN]* 02/13/2012
Sen. Crapo, Mike [R-ID] 02/15/2012
Sen. Thune, John [R-SD] 03/01/2012