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* = Original cosponsor

CosponsorDate Cosponsored
Sen. Collins, Susan M. [R-ME]* 07/31/2013
Sen. Warren, Elizabeth [D-MA]* 07/31/2013
Sen. Grassley, Chuck [R-IA]* 07/31/2013
Sen. Brown, Sherrod [D-OH]* 07/31/2013
Sen. Rockefeller, John D., IV [D-WV]* 07/31/2013
Sen. Murphy, Christopher S. [D-CT]* 07/31/2013
Sen. Udall, Mark [D-CO] 08/01/2013