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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Harkin, Tom [D-IA]* 02/14/2007
Sen. Roberts, Pat [R-KS]* 02/14/2007
Sen. Lincoln, Blanche L. [D-AR]* 02/14/2007
Sen. Cochran, Thad [R-MS]* 02/14/2007
Sen. Leahy, Patrick J. [D-VT]* 02/14/2007
Sen. Smith, Gordon H. [R-OR] 03/08/2007
Sen. Lugar, Richard G. [R-IN] 05/02/2007
Sen. Durbin, Richard [D-IL] 05/02/2007
Sen. Wyden, Ron [D-OR] 10/25/2007