This analysis provides an assessment of reductions in greenhouse gas (GHG) emissions relative to total U.S. emissions that could be achieved by cap-and-trade proposals submitted in the 111th Congress. This assessment is an update to a previous analysis released on May 19, 2009 and includes an assessment of the substitute to H.R. 2454 , the American Clean Energy and Security Act of 2009 (ACESA) and H.R. 1862, the Cap and Dividend Act of 2009 (CDA) sponsored by Congressman Van Hollen.