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* = Original cosponsor

CosponsorDate Cosponsored
Sen. Warner, John [R-VA]* 10/18/2007
Sen. Harkin, Tom [D-IA]* 10/18/2007
Sen. Coleman, Norm [R-MN]* 10/18/2007
Sen. Dole, Elizabeth [R-NC]* 10/18/2007
Sen. Collins, Susan M. [R-ME]* 10/18/2007
Sen. Cardin, Benjamin L. [D-MD]* 10/18/2007
Sen. Klobuchar, Amy [D-MN]* 10/18/2007
Sen. Casey, Robert P., Jr. [D-PA]* 10/18/2007
Sen. Nelson, Bill [D-FL] 10/30/2007
Sen. Wyden, Ron [D-OR] 12/17/2007
Sen. Schumer, Charles E. [D-NY] 02/28/2008