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* = Original cosponsor
Cosponsor Date Cosponsored
Sen. Thune, John [R-SD]* 06/11/2012
Sen. Bennet, Michael F. [D-CO]* 06/11/2012
Sen. Baucus, Max [D-MT]* 06/11/2012
Sen. Begich, Mark [D-AK] 06/12/2012
Sen. Johnson, Tim [D-SD] 06/12/2012
Sen. Feinstein, Dianne [D-CA] 06/13/2012
Sen. Merkley, Jeff [D-OR] 06/14/2012
Sen. Udall, Tom [D-NM] 06/20/2012