In December 2014, Manchin was one of six Democratic senators to sign a letter to the EPA urging it to give states more time to comply with its rule on power plants because the final rule "must provide adequate time for the design, permitting and construction of such large scale capital intensive infrastructure", and calling for an elimination of the 2020 targets in the final rule, a mandate that states take action by 2020 as part of the EPA's goal to reach a 30% carbon cut by 2030.