When Republican presidential candidate Sen. Ted Cruz came to the Bronx to campaign in the run-up to the New York primary, ridicule was not far away. After all, what is a Republican candidate doing in the staunchly Democratic, minority-majority northern part of New York City? What is he doing in New York State at all, when Donald Trump is nearly certain to carry the most votes and, according to market-based forecasts, has an 85 percent chance to win more than 50 percent of the vote? Why would Ted Cruz campaign in the Bronx? For someone like Cruz to campaign exactly...