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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Bingaman, Jeff [D-NM] 03/14/2011
Sen. Bennet, Michael F. [D-CO] 03/30/2011
Sen. Alexander, Lamar [R-TN] 06/22/2011
Sen. Udall, Tom [D-NM] 10/13/2011