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* = Original cosponsor
Cosponsor Date Cosponsored
Sen. Tester, Jon [D-MT]* 05/05/2008
Sen. Bingaman, Jeff [D-NM]* 05/05/2008
Sen. Snowe, Olympia J. [R-ME]* 05/05/2008
Sen. Wyden, Ron [D-OR]* 05/05/2008
Sen. Harkin, Tom [D-IA]* 05/05/2008
Sen. Thune, John [R-SD]* 05/05/2008
Sen. Levin, Carl [D-MI]* 05/05/2008