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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Bayh, Evan [D-IN]* 06/25/2007
Sen. Clinton, Hillary Rodham [D-NY]* 06/25/2007
Sen. Isakson, Johnny [R-GA]* 06/25/2007
Sen. Kennedy, Edward M. [D-MA]* 06/25/2007
Sen. Kerry, John F. [D-MA]* 06/25/2007
Sen. Lautenberg, Frank R. [D-NJ]* 06/25/2007
Sen. Mikulski, Barbara A. [D-MD]* 06/25/2007
Sen. Murkowski, Lisa [R-AK]* 06/25/2007
Sen. Vitter, David [R-LA]* 06/25/2007
Sen. Stevens, Ted [R-AK] 07/20/2007
Sen. Biden, Joseph R., Jr. [D-DE] 07/20/2007