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* = Original cosponsor

CosponsorDate Cosponsored
Rep. Markey, Betsy [D-CO-4]* 01/13/2010
Rep. Polis, Jared [D-CO-2] 01/19/2010
Rep. Perlmutter, Ed [D-CO-7] 01/20/2010
Rep. DeGette, Diana [D-CO-1] 01/22/2010