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* = Original cosponsor
Cosponsor Date Cosponsored
Sen. Grassley, Chuck [R-IA]* 11/15/2007
Sen. Harkin, Tom [D-IA] 12/11/2007
Sen. Nelson, Ben [D-NE] 12/11/2007
Sen. Feingold, Russell D. [D-WI] 12/11/2007
Sen. Johnson, Tim [D-SD] 12/11/2007
Sen. Klobuchar, Amy [D-MN] 12/11/2007
Sen. Tester, Jon [D-MT] 12/11/2007
Sen. Obama, Barack [D-IL] 12/11/2007
Sen. Hagel, Chuck [R-NE] 12/11/2007
Sen. Dodd, Christopher J. [D-CT] 12/11/2007
Sen. Menendez, Robert [D-NJ] 12/11/2007
Sen. McCain, John [R-AZ] 12/11/2007