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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Collins, Susan M. [R-ME]* 05/22/2007
Sen. Sununu, John E. [R-NH] 06/07/2007
Sen. Voinovich, George V. [R-OH] 07/09/2007
Sen. Klobuchar, Amy [D-MN] 07/09/2007