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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Enzi, Michael B. [R-WY]* 02/14/2013
Sen. Hatch, Orrin G. [R-UT]* 02/14/2013
Sen. Lee, Mike [R-UT]* 02/14/2013
Sen. Johnson, Tim [D-SD]* 02/14/2013
Sen. Thune, John [R-SD]* 02/14/2013
Sen. Udall, Mark [D-CO]* 02/14/2013
Sen. Heller, Dean [R-NV] 04/23/2013
Sen. Flake, Jeff [R-AZ] 04/23/2013
Sen. Risch, James E. [R-ID] 06/26/2013
Sen. Crapo, Mike [R-ID] 07/09/2013