On Election Day, Donald Trump’s surprising support in New York City wasn’t an outlier. Democrats woke up the next morning to significant defeats across the state. The shift was especially apparent on Long Island, where Trump became the first GOP presidential candidate to carry Nassau County since 1988. In a center-right congressional district that extends to the Hamptons, the incumbent Republican Nick LaLota easily defeated John Avlon, an appealing moderate Democrat with a pre-crazy Rudy Giuliani pedigree...