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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Portman, Rob [R-OH]* 02/12/2013
Sen. Chambliss, Saxby [R-GA]* 02/12/2013
Sen. Vitter, David [R-LA]* 02/12/2013
Sen. Kirk, Mark Steven [R-IL] 06/09/2014