The definitive quote about Brexit arrived yesterday, though technically it had nothing to do with Brexit at all. Asked in traumatised El Paso what Donald Trump could do to prevent more atrocities at the trigger-happy hands of white supremacists, Beto O’Rourke lost his rag.

The former congressman’s campaign for the Democratic nomination has virtually evaporated, but it might just be revived by his splendid response to a stupendously dumb question. “What do you think?” he snapped, sensibly reckoning the answer – stop being a racist agent provocateur – too self-evident to be worth the respiratory effort of stating. “I mean, members of the press…” he added, “what the f***?”