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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Boxer, Barbara [D-CA]* 03/29/2012
Sen. Landrieu, Mary L. [D-LA] 04/19/2012
Sen. Vitter, David [R-LA] 04/24/2012
Sen. Begich, Mark [D-AK] 04/26/2012
Sen. Bingaman, Jeff [D-NM] 04/26/2012
Sen. Mikulski, Barbara A. [D-MD] 04/26/2012