Last week in New Hampshire, Republican presidential candidate John Kasich gave what many considered a gracious speech. He had just finished second, keeping his dim campaign hopes alive. The Ohio governor congratulated Donald Trump on his victory and then went on to talk about his own vision for America. It boiled down to the fundamental conservative doctrine of government as a last resort and the need to make sure no American is left behind. But then he said something curious. He said on that night in New Hampshire the country had turned a page in what he called a dark...