Britain’s top diplomat is in Washington today hoping to realise an important, albeit ambitious, aim: persuading isolationist Americans not to abandon Ukraine

Curiously, while Democrats are the ones running the country, Republicans are the prime target of David Cameron’s charm offensive.

A meeting this afternoon with his American counterpart Anthony Blinken served as a key opportunity to discuss strengthening support for Ukraine as well as the vital issue of ending the bloodshed in Gaza. But, on the former matter, it is not Blinken who needs persuading.