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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Leahy, Patrick J. [D-VT]* 03/14/2013
Sen. Carper, Thomas R. [D-DE]* 03/14/2013
Sen. Sanders, Bernard [I-VT] 04/22/2013
Sen. McCaskill, Claire [D-MO] 07/25/2013
Sen. Levin, Carl [D-MI] 07/31/2013