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* = Original cosponsor

Cosponsor Date Cosponsored
Sen. Dorgan, Byron L. [D-ND]* 11/15/2007
Sen. Grassley, Chuck [R-IA]* 11/15/2007
Sen. Conrad, Kent [D-ND]* 11/15/2007
Sen. Johnson, Tim [D-SD]* 11/15/2007
Sen. Tester, Jon [D-MT]* 11/15/2007
Sen. Barrasso, John [R-WY]* 11/15/2007