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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Carper, Thomas R. [D-DE]* 03/02/2011
Sen. Lieberman, Joseph I. [ID-CT]* 03/02/2011
Sen. Shaheen, Jeanne [D-NH] 04/08/2011
Sen. Klobuchar, Amy [D-MN] 05/10/2011
Sen. Coons, Christopher A. [D-DE] 05/23/2011