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* = Original cosponsor
Cosponsor Date Cosponsored
Sen. Barrasso, John [R-WY]* 03/16/2011
Sen. Crapo, Mike [R-ID] 03/17/2011
Sen. Ensign, John [R-NV] 03/17/2011
Sen. Enzi, Michael B. [R-WY] 03/29/2011
Sen. Inhofe, James M. [R-OK] 03/30/2011