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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Carper, Thomas R. [D-DE]* 03/03/2008
Sen. Durbin, Richard [D-IL] 04/29/2008
Sen. Sanders, Bernard [I-VT] 04/29/2008
Sen. Coleman, Norm [R-MN] 04/29/2008
Sen. Levin, Carl [D-MI] 09/08/2008