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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Grassley, Chuck [R-IA]* 01/25/2011
Sen. Levin, Carl [D-MI]* 01/25/2011
Sen. Bingaman, Jeff [D-NM]* 01/25/2011
Sen. Wyden, Ron [D-OR]* 01/25/2011
Sen. Conrad, Kent [D-ND]* 01/25/2011
Sen. Enzi, Michael B. [R-WY]* 01/25/2011
Sen. Kerry, John F. [D-MA]* 01/25/2011
Sen. Stabenow, Debbie [D-MI] 02/01/2011
Sen. Whitehouse, Sheldon [D-RI] 02/02/2011
Sen. Risch, James E. [R-ID] 05/25/2011