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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Dorgan, Byron L. [D-ND]* 05/06/2008
Sen. Levin, Carl [D-MI]* 05/06/2008
Sen. Casey, Robert P., Jr. [D-PA]* 05/06/2008
Sen. Sanders, Bernard [I-VT]* 05/06/2008
Sen. Clinton, Hillary Rodham [D-NY]* 05/06/2008
Sen. Menendez, Robert [D-NJ] 06/23/2008
Sen. Boxer, Barbara [D-CA] 06/23/2008