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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Portman, Rob [R-OH]* 10/18/2011
Sen. Whitehouse, Sheldon [D-RI] 10/31/2011
Sen. Levin, Carl [D-MI] 10/31/2011
Sen. Reed, Jack [D-RI] 10/31/2011
Sen. Stabenow, Debbie [D-MI] 10/31/2011
Sen. Merkley, Jeff [D-OR] 11/16/2011
Sen. Klobuchar, Amy [D-MN] 11/16/2011
Sen. Lautenberg, Frank R. [D-NJ] 12/06/2011