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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Lieberman, Joseph I. [ID-CT]* 04/24/2007
Sen. Leahy, Patrick J. [D-VT]* 04/24/2007
Sen. Feingold, Russell D. [D-WI]* 04/24/2007
Sen. Clinton, Hillary Rodham [D-NY] 07/28/2008