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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Wyden, Ron [D-OR]* 04/03/2008
Sen. Casey, Robert P., Jr. [D-PA]* 04/03/2008
Sen. Smith, Gordon H. [R-OR] 06/27/2008
Sen. Brownback, Sam [R-KS] 09/25/2008
Sen. Kyl, Jon [R-AZ] 09/26/2008