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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Bennet, Michael F. [D-CO]* 01/23/2013
Sen. Klobuchar, Amy [D-MN]* 01/23/2013
Sen. Burr, Richard [R-NC]* 01/23/2013
Sen. Kirk, Mark Steven [R-IL]* 01/23/2013
Sen. Collins, Susan M. [R-ME] 02/07/2013
Sen. Portman, Rob [R-OH] 02/07/2013
Sen. Heller, Dean [R-NV] 10/29/2013