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CosponsorDate Cosponsored
Rep. Markey, Betsy [D-CO-4] 12/11/2009
Rep. Polis, Jared [D-CO-2] 12/15/2009
Rep. Coffman, Mike [R-CO-6] 01/13/2010
Rep. Salazar, John T. [D-CO-3] 04/27/2010