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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Mikulski, Barbara A. [D-MD]* 07/28/2005
Sen. Murkowski, Lisa [R-AK]* 07/28/2005
Sen. Obama, Barack [D-IL] 09/06/2005
Sen. Carper, Thomas R. [D-DE] 12/13/2005