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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Murkowski, Lisa [R-AK]* 01/31/2011
Sen. Murray, Patty [D-WA]* 01/31/2011
Sen. Mikulski, Barbara A. [D-MD] 06/15/2011
Sen. Feinstein, Dianne [D-CA] 10/17/2011