Somewhere, buried in Rick Santorum’s fatally flawed campaign messaging, were winning words. Had he committed to them, the former senator could have derailed Mitt Romney’s path to the GOP nomination. Despite Romney’s overpowering resources and organization, Santorum’s potent argument — that the party could not throw the issue of healthcare away by nominating someone who had supported mandates — was his key to victory, but he threw it away. As he transformed from Senator 2 Percent to the last credible alternative to Romney, Santorum often made the point that nominating Romney — or Newt Gingrich — would take the issue...