Donald Trump's migrant policy shows he has finally gone too far

Historians will still be asking in 100 years’ time why public outrage did not do Donald Trump more harm. How come he could keep seeming to offend three-quarters of America yet still end up with half the vote? The answer, I think, is that his opponents kept falling into the same trap: they kept over-reacting. Mildly-objectionable comments and policies were met with full-on Twitter storms, making his opponents end up looking like the ones who were deranged. When you went back and thought about what Trump had actually said he kept coming across, if not reasonable, then as less unreasonable than the voices raging against him. You found yourself asking: it might be a waste of concrete, it might do nothing to deal with the problem of migrants overstaying their visas, but is building a border wall with Mexico really such an outrage when previous presidents have part-built a fence, as have many other countries in the world? Is it really that unreasonable to place a temporary ban on travellers from countries where law and order has broken down and you can’t vet visa applicants? As for ‘grabbing a pussy’, the outrage merely served to remind the public of Bill Clinton’s behaviour in the White House, with which his wife seemed to have little issue.