How did Scott Pruitt go from fighting the EPA to running the agency and rolling back years of policy? In this gripping documentary, FRONTLINE investigates the conservative political forces and causes, like climate change skepticism, that propelled Pruitt’s takeover of the EPA. With access to key players on all sides of the issue, the film traces how the fossil fuel industry fought back against Obama-era regulations with the help of a “strike force” of industry-funded state attorneys general, led by Pruitt. It also explores how Pruitt — a former state senator and minor league baseball team owner—came to political prominence first in Oklahoma and then in Washington, D.C. by pledging to fight federal environmental regulations, and defend the oil and gas industries. With Pruitt now leading the federal agency he sued 14 times as Oklahoma’s attorney general, War on the EPA is an inside look at the triumphant ascent of the anti-regulatory movement in America.