L.A. in 1970. Back to the future? Photo: Nik Wheeler/Corbis/Getty Images There are so many extremist happenings in Washington right now that it’s easy to miss historic developments in the fog of ideological warfare. So even as attention was riveted on House passage of Trump’s One Big Beautiful Bill Act, the Senate busied itself ending a precedent dating back to the Nixon administration — and the governorship of Ronald Reagan — of deference to the state of California on setting air-quality