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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Domenici, Pete V. [R-NM]* 02/01/2007
Sen. Dorgan, Byron L. [D-ND]* 02/01/2007
Sen. McCain, John [R-AZ]* 02/01/2007
Sen. Bingaman, Jeff [D-NM]* 02/01/2007
Sen. Kohl, Herb [D-WI]* 02/01/2007
Sen. Thune, John [R-SD]* 02/01/2007
Sen. Tester, Jon [D-MT] 02/07/2007
Sen. Johnson, Tim [D-SD] 03/05/2007