Investigates how Scott Pruit, a former state senator and minor league baseball team owner, went from fighting the Environmental Protection Agency to running it, rolling back years of policy. FRONTLINE tells the inside story of how the major reversal of the Clean Power Plan and other environmental policy rollbacks happened; how President Trump’s Environmental Protection Agency administrator, Scott Pruitt, went from fighting the federal agency to running it; and how the anti-regulatory and anti-climate change science movements in America reached a moment of triumph.