On his wall Donald Trump’s erstwhile chief strategist, Steve Bannon, has a picture of Napoleon at the Tuileries. An oil painting. Actually, it isn’t quite a picture of Napoleon. It is of Mr Bannon dressed as the French leader at the Tuileries, painted in the style of Jacques-Louis David’s great imperial portraits. It was a present from Nigel Farage.

Last week Mr Bannon was sent into exile. But I strongly suspect it is exile to Elba rather than Saint Helena. The Napoleon of Breitbart has not yet fought his final battle. And this is relevant not just in the United States, but in the UK too.

“Mr Bannon came on very late.” Even when Donald Trump says something that is true, as with this statement