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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Lieberman, Joseph I. [ID-CT]* 05/09/2007
Sen. Collins, Susan M. [R-ME]* 05/09/2007
Sen. Levin, Carl [D-MI]* 05/09/2007
Sen. Leahy, Patrick J. [D-VT]* 05/09/2007
Sen. Feingold, Russell D. [D-WI]* 05/09/2007
Sen. Clinton, Hillary Rodham [D-NY]* 05/09/2007
Sen. Brown, Sherrod [D-OH] 06/04/2007