In March 2016, I covered a Donald Trump rally in Vandalia, Ohio, for local radio station WYSO and NPR’s Weekend Edition. It was both familiar and eerie: Comfortable suburbanites, old people who’d driven hours from rural places, and children in red hats who cheered, then chanted, then jeered in unison, “Build the wall!” Trump told an apocryphal story about a U.S. general dipping bullets in pig’s blood before executing 49 Muslim prisoners of war. Protesters were dragged out one by one, and someone in the crowd shouted, “Off with their heads” as Trump mocked them from the podium. At the end of the rally, I ran into someone I knew: a man from a trailer park that had been facing frequent water shutoffs. I’d knocked on his door when I was reporting the first national story about that struggle.