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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Voinovich, George V. [R-OH]* 05/15/2008
Sen. Stabenow, Debbie [D-MI] 05/22/2008
Sen. Cardin, Benjamin L. [D-MD] 06/16/2008
Sen. Feingold, Russell D. [D-WI] 06/17/2008