This is about all of us, this is about you,” Gavin Newsom declared this week, his eyes boring into the lens of a camera. In a televised speech styled like a State of the Union address, the California governor warned that the scenes in Los Angeles, where thousands of military troops took to the streets this week to clamp down on protests against President Trump’s immigration raids, were a taste of things to come. “Other states are next. Democracy is next. Democracy is under assault before our eyes. This moment we have feared has arrived,” he said. Newsom’s latest battle...