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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Whitehouse, Sheldon [D-RI]* 09/19/2013
Sen. Begich, Mark [D-AK]* 09/19/2013
Sen. Shaheen, Jeanne [D-NH]* 09/19/2013
Sen. Markey, Edward J. [D-MA] 01/14/2014
Sen. Mikulski, Barbara A. [D-MD] 09/08/2014