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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Enzi, Michael B. [R-WY]* 11/13/2007
Sen. Vitter, David [R-LA] 11/15/2007
Sen. Chambliss, Saxby [R-GA] 11/15/2007
Sen. Ensign, John [R-NV] 12/05/2007