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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Cantwell, Maria [D-WA]* 03/21/2013
Sen. Blumenthal, Richard [D-CT]* 03/21/2013
Sen. Nelson, Bill [D-FL]* 03/21/2013
Sen. Rockefeller, John D., IV [D-WV] 04/11/2013
Sen. Boxer, Barbara [D-CA] 04/16/2013
Sen. Markey, Edward J. [D-MA] 01/15/2014