Donald Trump’s feat in dismissing all other Republicans from the US presidential race ought not to come as a surprise. I noted months ago that he was a more serious prospect than most believed – or wanted to believe – and when I wrote from America in March after Super Tuesday it was to say he seemed unstoppable. If the Republican Party wants to destroy itself, it could attempt to impose another candidate: but otherwise, Mr Trump is in the final.

He may not be the next president: but, again, it is a far more possible outcome than many believe – or want to believe. Surveys show his support is far from confined to blue-collar white men. The political class, and the pundits who cosy up to them, cannot understand why he has become the first man since Eisenhower to get to a US general election without having held any elected office.