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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Snowe, Olympia J. [R-ME]* 01/04/2007
Sen. Biden, Joseph R., Jr. [D-DE]* 01/04/2007
Sen. Lieberman, Joseph I. [D-CT]* 01/04/2007
Sen. Brown, Sherrod [D-OH] 06/18/2007