Lovely to see – to hear – Obama chopping Trump down. Being president is not about a being a talk show host, about marketing, about publicity, it’s about making difficult decisions, and some are unpopular, some will hurt people, and being well-briefed in your dealings with other world leaders – they too have ‘their own crowds back home’. That last point I especially liked – you, Donald, are not alone in this world.

There’s a piece in the Economist on American conservative talk radio, hosted by the semi-crazed (Rush Limbaugh, Glenn Beck) who somehow in the rarefied air of the prairies don’t just to get a hearing but strike a few big chords – or a few bum notes. If bum notes are all you hear, would you recognise a chord?

Does it give joy to Trump to be supported by such people – how much of a conscious game is he playing with them – feeding them pap?

Ted Cruz is no better, but while you feel that for Trump it is a big game, and a big ego, for Ted Cruz it is deadly, evangelically serious. He also feeds the talk shows with great material. The trouble is – he believes it all, and he can express himself with a degree of coherence. And he is so sure he’s right that compromise and balance, which is what the American constitution requires, gets shown the door. And America becomes ungovernable, as it halfway is now.

What also bugs me is Cruz’s call on the Bible, and Jesus, to support him. He sure as hell – almost literally – wouldn’t get close to the pearly gates. America has always been too good – the prairies again – at creating its own religions.

Only one small pleasure in all this – a little bit of humour – Fox News almost the good guys. They do at least have a small idea that politics is about governing – and governing, as John Kasich the best of the Republican contenders has made clear, is a serious matter, about results and balanced budgets and not public platforms.

The UK is – to use totally the wrong expression – a different ballgame. But we also have the same populist right-wing nonsense to deal with and it’s big in the media – thank God we’re spared talk shows. But we do, sadly, have the Mail.

Obama mentions that one aspect of government is looking out for the underdog – ‘standing up for people who are vulnerable and don’t have some powerful political constituency’. And that is the ultimate litmus test of any politics.

To quote Bob Dylan’s Chimes of Freedom, which I’ve done before:

Tolling for the aching ones whose wounds cannot be nursed/ For the countless confused, accused, misused, strung-out ones an’ worse/ An’ for every hung-up person in the whole wide universe/ An’ we gazed upon the chimes of freedom flashing