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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Rockefeller, John D., IV [D-WV]* 02/03/2011
Sen. Menendez, Robert [D-NJ]* 02/03/2011
Sen. Begich, Mark [D-AK]* 02/03/2011
Sen. Casey, Robert P., Jr. [D-PA] 04/04/2011
Sen. Udall, Tom [D-NM] 05/05/2011