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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Voinovich, George V. [R-OH]* 03/06/2008
Sen. Mikulski, Barbara A. [D-MD]* 03/06/2008
Sen. Carper, Thomas R. [D-DE]* 03/06/2008
Sen. Biden, Joseph R., Jr. [D-DE]* 03/06/2008
Sen. Levin, Carl [D-MI]* 03/06/2008