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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Baucus, Max [D-MT]* 01/26/2007
Sen. Thune, John [R-SD]* 01/26/2007
Sen. Grassley, Chuck [R-IA]* 01/26/2007
Sen. Tester, Jon [D-MT]* 01/26/2007
Sen. Bingaman, Jeff [D-NM]* 01/26/2007
Sen. Dorgan, Byron L. [D-ND]* 01/26/2007
Sen. Enzi, Michael B. [R-WY]* 01/26/2007
Sen. Conrad, Kent [D-ND]* 01/26/2007
Sen. Feingold, Russell D. [D-WI] 03/07/2007
Sen. Johnson, Tim [D-SD] 03/07/2007
Sen. Clinton, Hillary Rodham [D-NY] 04/12/2007
Sen. Wyden, Ron [D-OR] 07/10/2007