The president is fixated on America’s Democratic cities. Going after places that welcome immigrants has become a favourite policy. Yet on September 4th his administration arrested 475 foreign workers at a Hyundai electric-car factory just outside Ellabell, Georgia, a sleepy rural town deep in Republican country. Over 400 agents fanned out across the plant, ordering workers to present their papers or be carted off. Most of the people detained were South Korean nationals with the wrong kind of visas. Homeland Security declared it the biggest worksite raid ever conducted in the department’s two-decade history.