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* = Original cosponsor

CosponsorDate Cosponsored
Sen. Begich, Mark [D-AK]* 03/17/2011
Sen. Bingaman, Jeff [D-NM]* 03/17/2011
Sen. Cantwell, Maria [D-WA]* 03/17/2011
Sen. Crapo, Mike [R-ID]* 03/17/2011
Sen. Murray, Patty [D-WA]* 03/17/2011
Sen. Risch, James E. [R-ID]* 03/17/2011
Sen. Whitehouse, Sheldon [D-RI]* 03/17/2011
Sen. Wyden, Ron [D-OR]* 03/17/2011
Sen. Udall, Tom [D-NM] 11/15/2012