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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Enzi, Michael B. [R-WY]* 02/15/2007
Sen. Feingold, Russell D. [D-WI]* 02/15/2007
Sen. Thomas, Craig [R-WY]* 02/15/2007
Sen. Dorgan, Byron L. [D-ND]* 02/15/2007
Sen. Baucus, Max [D-MT]* 02/15/2007
Sen. McCaskill, Claire [D-MO]* 02/15/2007
Sen. Brown, Sherrod [D-OH] 05/03/2007
Sen. Clinton, Hillary Rodham [D-NY] 06/19/2007