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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Specter, Arlen [R-PA]* 05/13/2008
Sen. Mikulski, Barbara A. [D-MD]* 05/13/2008
Sen. Shelby, Richard C. [R-AL]* 05/13/2008
Sen. Hatch, Orrin G. [R-UT]* 05/13/2008
Sen. Obama, Barack [D-IL]* 05/13/2008
Sen. Reed, Jack [D-RI] 06/06/2008
Sen. Casey, Robert P., Jr. [D-PA] 06/16/2008
Sen. Biden, Joseph R., Jr. [D-DE] 08/01/2008