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* = Original cosponsor

CosponsorDate Cosponsored
Sen. Murray, Patty [D-WA]* 08/01/2013
Sen. Wyden, Ron [D-OR]* 08/01/2013
Sen. Udall, Mark [D-CO]* 08/01/2013
Sen. Merkley, Jeff [D-OR]* 08/01/2013
Sen. Udall, Tom [D-NM]* 08/01/2013
Sen. Gillibrand, Kirsten E. [D-NY]* 08/01/2013
Sen. Coons, Christopher A. [D-DE]* 08/01/2013
Sen. Whitehouse, Sheldon [D-RI]* 08/01/2013
Sen. Tester, Jon [D-MT]* 08/01/2013
Sen. Franken, Al [D-MN]* 08/01/2013
Sen. Baldwin, Tammy [D-WI]* 08/01/2013
Sen. Heinrich, Martin [D-NM]* 08/01/2013
Sen. Markey, Edward J. [D-MA]* 08/01/2013
Sen. Hirono, Mazie K. [D-HI]* 08/01/2013
Sen. Schatz, Brian [D-HI]* 08/01/2013
Sen. Harkin, Tom [D-IA] 10/02/2013
Sen. Shaheen, Jeanne [D-NH] 01/07/2014
Sen. Durbin, Richard [D-IL] 01/29/2014