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* = Original cosponsor
Cosponsor Date Cosponsored
Sen. Collins, Susan M. [R-ME]* 07/31/2012
Sen. Rockefeller, John D., IV [D-WV]* 07/31/2012
Sen. Feinstein, Dianne [D-CA]* 07/31/2012
Sen. Carper, Thomas R. [D-DE]* 07/31/2012