EPA Administrator Scott Pruitt, who in his previous role as Oklahoma attorney general sued the agency over the Clean Power Plan, has long argued that the Obama administration acted unlawfully. In particular, he and other opponents argued that the regulations required power plants to take actions "outside the fence line," rather than regulating activities that only take place on a particular facility. In addition, he argued that the Clean Power Plan set emissions limits that could be met only by subsidizing the creation of massive new amounts of wind and solar energy, while also limiting consumption of coal- and gas-powered electricity.