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* = Original cosponsor
Cosponsor Date Cosponsored
Sen. Toomey, Pat [R-PA]* 03/07/2012
Sen. Blunt, Roy [R-MO]* 03/07/2012
Sen. Tester, Jon [D-MT] 03/13/2012
Sen. McCaskill, Claire [D-MO] 03/13/2012
Sen. Lugar, Richard G. [R-IN] 03/13/2012
Sen. Klobuchar, Amy [D-MN] 03/13/2012