Some of you questioned my evocation of history's great villain in a recent column on House Speaker Paul Ryan's surrender to presumptive GOP nominee Donald Trump. I likened Ryan to Franz von Papen, a German politician who helped Adolf Hitler rise to power under the naive delusion that he could control him.
A handful of Trump fans found that, as one put it, "a bit of a stretch." One guy expressed his skepticism through the time-honored expedient of the triple punctuation mark: "Hitler???"
Not that their dubiousness is unreasonable. In recent years, Hitler and the Holocaust have popped up in political debate as routinely...