Late yesterday evening, ‘a senior administration official’ confirmed that the United States will today recognise Israeli sovereignty over Jerusalem. Given that the policy is to be announced by Donald Trump, a volatile airhead presiding over a highly fractious government, it’s still far from clear how – or even whether – Washington will put forward a new position. But if, as expected, the US does proceed with this measure, the physical relocation of the American Embassy from Tel Aviv to Jerusalem will be the least of it.