A couple of weeks ago, the Republican presidential hopeful Jeb Bush was asked in an interview with Fox News whether, knowing what he knows now, he would have invaded Iraq.
It’s the kind of predictable question for which most people assumed he would have a coherent answer. They were wrong. Jeb blew it. “I would have [authorised the invasion],” he said. “And so would have Hillary Clinton, just to remind everybody. And so would almost everybody that was confronted with the intelligence they got.”