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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Johnson, Tim [D-SD]* 04/30/2008
Sen. Bingaman, Jeff [D-NM]* 04/30/2008
Sen. Hatch, Orrin G. [R-UT] 05/01/2008
Sen. Collins, Susan M. [R-ME] 05/01/2008