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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Boxer, Barbara [D-CA]* 03/07/2007
Sen. Mikulski, Barbara A. [D-MD]* 03/07/2007
Sen. Kerry, John F. [D-MA]* 03/07/2007
Sen. Leahy, Patrick J. [D-VT]* 03/07/2007
Sen. Lautenberg, Frank R. [D-NJ]* 03/07/2007
Sen. Obama, Barack [D-IL] 03/08/2007
Sen. Brown, Sherrod [D-OH] 05/24/2007