I’ve been paying close attention to Donald Trump since we happened to see his speech in Las Vegas that took him to the top of the polls. But politics is not about having a set of opinions. It is about working with other people to achieve collective ends. The business with Megyn Kelly is the finish of him so far as I am concerned, and I am unlikely to be alone on this.

It’s not just the disgust he creates. It’s his lack of proportion. It’s his attitude to the views of those who disagree with him that is so disturbing. He has never run for or held political office. He has only run businesses, which is precisely the wrong kind of experience for anyone in politics. A business is an organisation that does work by command and control. There are decision makers and those who put those decisions into effect. That is not the way a free society works.

Obama has much in common with Trump and has turned out to be the worst president in American history. My way or the highway, with the result that everything of any significance he has become involved with has turned out a disaster. Trump would be no worse, but he would be no better.

A presidential system is the worst form of democracy you can have. The last few years have shown how flawed a system it can be. We can only hope for a better outcome after 2017.