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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Crapo, Mike [R-ID]* 05/17/2010
Sen. Tester, Jon [D-MT]* 05/17/2010
Sen. Risch, James E. [R-ID] 05/19/2010
Sen. Barrasso, John [R-WY] 08/03/2010