THERE ARE countries in the world where machete-wielding teenagers intimidating voters are a routine part of elections. America is not normally among them. Yet on October 29th an 18-year-old man in Florida was arrested for doing exactly that. Caleb James Williams was, according to local police, part of a group of eight young men hanging out in the parking lot of an early-vote polling station in suburban Jacksonville, waving Donald Trump flags and chanting slogans. Mr Williams allegedly “brandished a machete in an aggressive, threatening posture over his head” at two women who were supporting Kamala Harris.