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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Barrasso, John [R-WY] 02/08/2008
Sen. Enzi, Michael B. [R-WY] 02/08/2008
Sen. Tester, Jon [D-MT] 02/08/2008
Sen. Bingaman, Jeff [D-NM] 02/12/2008
Sen. Conrad, Kent [D-ND] 04/02/2008
Sen. Allard, Wayne [R-CO] 04/03/2008