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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Levin, Carl [D-MI]* 06/15/2011
Sen. Akaka, Daniel K. [D-HI]* 06/15/2011
Sen. Durbin, Richard [D-IL]* 06/15/2011
Sen. Blumenthal, Richard [D-CT] 04/26/2012