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* = Original cosponsor
Cosponsor Date Cosponsored
Sen. Warner, Mark R. [D-VA]* 02/14/2012
Sen. Murkowski, Lisa [R-AK]* 02/14/2012
Sen. Levin, Carl [D-MI] 02/15/2012
Sen. Stabenow, Debbie [D-MI] 02/16/2012
Sen. Collins, Susan M. [R-ME] 02/28/2012