In the absence of a national energy policy, about 30 states have adopted plans to create more electricity from renewable sources. This patchwork of incentives is crucial to the development of the wind-power and solar-energy industries, and hundreds of thousands of jobs; the shift to renewables is also necessary to combat climate change. Yet even these modest state policies are under attack from groups including Americans for Prosperity and the American Legislative Exchange Council, which are both closely aligned with the billionaire Koch brothers. It’s a staggeringly misguided attempt to convince voters, mostly in economically struggling states, that renewable-energy targets are driving up their electric bills. Yet it may be bearing fruit.