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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Domenici, Pete V. [R-NM]* 08/02/2007
Sen. Bingaman, Jeff [D-NM]* 08/02/2007
Sen. Smith, Gordon H. [R-OR]* 08/02/2007
Sen. Stabenow, Debbie [D-MI]* 08/02/2007
Sen. McCain, John [R-AZ]* 08/02/2007
Sen. Cantwell, Maria [D-WA]* 08/02/2007
Sen. Levin, Carl [D-MI]* 08/02/2007
Sen. Dorgan, Byron L. [D-ND] 09/12/2007
Sen. Tester, Jon [D-MT] 11/05/2007
Sen. Johnson, Tim [D-SD] 06/12/2008