To the list of monstrous movie politicians who now seem desirable compared to Trump, add the conservative singer-turned-politician of Tim Robbins’ directorial debut. In 1992 it was the stuff of crazy fiction: A mockumentary that trailed a famous face who got a bug up his ass and decided to run for office. (It was only a Senate seat, but still.) He exploited populist fears, embellished the country’s hardships. He even hosted a “Saturday Night Live” stand-in. (The one difference: certain cast members actually boycotted it.) He played dirty and poisoned the public discourse. And as with most far-fetched satirical fiction, we all thought it was too ridiculous to happen for real. Boy, would we settle for a folk singing pol who sang right-wing songs now.