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* = Original cosponsor
Cosponsor Date Cosponsored
Sen. Grassley, Chuck [R-IA]* 03/22/2013
Sen. Sanders, Bernard [I-VT]* 03/22/2013
Sen. Warren, Elizabeth [D-MA]* 03/22/2013
Sen. Heller, Dean [R-NV]* 03/22/2013
Sen. Tester, Jon [D-MT]* 03/22/2013
Sen. Cornyn, John [R-TX]* 03/22/2013
Sen. Shelby, Richard C. [R-AL]* 03/22/2013
Sen. Begich, Mark [D-AK]* 03/22/2013
Sen. Levin, Carl [D-MI]* 03/22/2013