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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Boozman, John [R-AR]* 05/10/2012
Sen. Vitter, David [R-LA]* 05/10/2012
Sen. Coburn, Tom [R-OK] 05/14/2012
Sen. Johanns, Mike [R-NE] 09/20/2012