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* = Original cosponsor

CosponsorDate Cosponsored
Sen. Leahy, Patrick J. [D-VT]* 08/01/2013
Sen. Udall, Tom [D-NM]* 08/01/2013
Sen. Blumenthal, Richard [D-CT]* 08/01/2013
Sen. Merkley, Jeff [D-OR]* 08/01/2013
Sen. Udall, Mark [D-CO]* 08/01/2013
Sen. Wyden, Ron [D-OR]* 08/01/2013
Sen. Tester, Jon [D-MT]* 08/01/2013
Sen. Markey, Edward J. [D-MA]* 08/01/2013
Sen. Durbin, Richard [D-IL]* 08/01/2013
Sen. Warren, Elizabeth [D-MA]* 08/01/2013
Sen. Harkin, Tom [D-IA] 09/18/2013
Sen. Coons, Christopher A. [D-DE] 10/29/2013
Sen. Shaheen, Jeanne [D-NH] 01/08/2014