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* = Original cosponsor
Cosponsor Date Cosponsored
Sen. Nelson, Ben [D-NE]* 06/14/2012
Sen. Harkin, Tom [D-IA]* 06/14/2012
Sen. Franken, Al [D-MN]* 06/14/2012
Sen. Tester, Jon [D-MT]* 06/14/2012
Sen. Begich, Mark [D-AK]* 06/14/2012
Sen. Johnson, Tim [D-SD]* 06/14/2012