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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Enzi, Michael B. [R-WY]* 01/28/2009
Sen. Tester, Jon [D-MT]* 01/28/2009
Sen. Thune, John [R-SD]* 01/28/2009
Sen. McCaskill, Claire [D-MO]* 01/28/2009
Sen. Dorgan, Byron L. [D-ND]* 01/28/2009
Sen. Nelson, Ben [D-NE]* 01/28/2009
Sen. Barrasso, John [R-WY]* 01/28/2009
Sen. Conrad, Kent [D-ND]* 01/28/2009
Sen. Boxer, Barbara [D-CA] 06/17/2009