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* = Original cosponsor

CosponsorDate Cosponsored
Sen. Grassley, Chuck [R-IA]* 07/18/2011
Sen. Coburn, Tom [R-OK] 08/01/2011
Sen. Barrasso, John [R-WY] 09/06/2011
Sen. Burr, Richard [R-NC] 09/07/2011