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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Grassley, Chuck [R-IA]* 01/25/2011
Sen. Durbin, Richard [D-IL]* 01/25/2011
Sen. Collins, Susan M. [R-ME]* 01/25/2011
Sen. Klobuchar, Amy [D-MN]* 01/25/2011
Sen. Franken, Al [D-MN]* 01/25/2011
Sen. Brown, Sherrod [D-OH]* 01/25/2011
Sen. Sanders, Bernard [I-VT]* 01/25/2011
Sen. Johnson, Tim [D-SD] 02/01/2011
Sen. Bingaman, Jeff [D-NM] 02/01/2012