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* = Original cosponsor
Cosponsor Date Cosponsored
Sen. Collins, Susan M. [R-ME]* 07/25/2007
Sen. Voinovich, George V. [R-OH]* 07/25/2007
Sen. Warner, John [R-VA]* 07/25/2007
Sen. Kyl, Jon [R-AZ] 07/26/2007