ROGER SIMON: John Fitzgerald Rubio? “Not only is Rubio the best speaker and the most attractive candidate, the buzz machine is right. He could be a Republican JFK. (Let’s leave aside whether JFK himself was JFK. We’re talking myth here.) He has youth, brains and charm. As of now he is easily the most charismatic candidate the GOP has had since Ronald Reagan. I know that’s not saying much. The GOP hasn’t been long on charisma. But Rubio clearly has got it.”