Automotive Americana is surely embodied by a two-door Jeep Wrangler. It’s short and upright, with a removable roof, visibly descended from an iconic wartime Jeep and part of the country’s open-air motoring identity. But currently, it doesn’t seem to be as popular with the American public as its four-door sibling. The latter is selling at several times the pace of the two-door, which is currently one of America’s slowest-moving new vehicles.