Marco Rubio’s 2016 Presidential campaign is over. Under-performing from the start, never able to get real traction and command serious attention from either the media or Republican Party insiders, Rubio vacated his Florida Senate seat to embark on a fool’s errand, chasing a ghost he never had any chance of capturing. Going in, it looked better: If there was ever a prototypically-perfect Republican candidate for a normal election cycle, Rubio was certainly it: Handsome, youthful and energetic, telegenic, personally likeableGreat verbal acuity, never at a loss for the quick, pithy answer, able to frame arguments in logical, sequential, easy-to-follow paragraphsImpressive...