Donald Trump rules over Washington as if he were a king and the White House his court. His displays of dominance, his need to be the centre of attention and his impetuousness have a whiff of Henry VIII about them. Fortified by his belief that his extraordinary route to power is proof of the collective mediocrity of Congress, the bureaucracy and the media, he attacks any person and any idea standing in his way.
Just how much trouble that can cause was on sensational display this week, with his sacking of James Comey—only the second director of the FBI to have been kicked out. Mr Comey has made mistakes and Mr Trump was within his rights. But the president has succeeded only in drawing attention to questions about his links to Russia and his contempt for the norms designed to hold would-be kings in check.
Just as dangerous, and no less important to ordinary Americans, however, is Mr Trump’s plan for the economy. It treats orthodoxy, accuracy and consistency as if they were simply to be negotiated away in a series of earth-shattering deals. Although Trumponomics could stoke a mini-boom, it, too, poses dangers to America and the world.