As has become typical in an election marked by its often unpleasant surprises, I awoke to a storm of outrage on Twitter on Wednesday morning. Newt Gingrich had told Fox’s Megyn Kelly that she was “fascinated with sex” and didn’t “care about public policy.” Mr. Gingrich unleashed this boorish attack after Ms. Kelly tried to pin him down on whether the many accusations of sexual assault against Donald J. Trump, and his own words on the matter, should disqualify him from the presidency. That Mr. Gingrich (with whom I once hosted a television show) thought the best way to deflect...