Donald Trump is the latest proof that the campaign always reflects the candidate and that the candidate is a product of his experience over the years. So, as Trump, after clinching the Republican nomination, reshuffles and rejiggers a campaign that has fallen behind Hillary Clinton, it's instructive to look at his political ground zero. That would be New York and its tabloid politics. I first encountered this in summer 1961, on a family vacation to New York City. As a teenager I was allowed to travel on the subway (15 cent fare, a dollar gets you six tokens and a...