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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Portman, Rob [R-OH]* 11/13/2013
Sen. Ayotte, Kelly [R-NH] 12/17/2013
Sen. Rubio, Marco [R-FL] 05/22/2014
Sen. Collins, Susan M. [R-ME] 09/10/2014