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* = Original cosponsor
CosponsorDate Cosponsored
Sen. Boxer, Barbara [D-CA]* 12/18/2007
Sen. Cornyn, John [R-TX] 04/16/2008
Sen. Menendez, Robert [D-NJ] 07/09/2008
Sen. Bingaman, Jeff [D-NM] 07/16/2008