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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Brown, Sherrod [D-OH]* 06/23/2011
Sen. Murkowski, Lisa [R-AK]* 06/23/2011
Sen. Coons, Christopher A. [D-DE] 03/19/2012
Sen. Gillibrand, Kirsten E. [D-NY] 05/08/2012