Despite his own privileged path to power, or perhaps because of it, the son of a Columbia University professor and a movie director is campaigning as a socialist intent on redistributing New York’s wealth.

He was 30 points behind former governor Andrew Cuomo just months ago, but now he’s surging in the contest to lead the largest US city

Despite his own privileged path to power, or perhaps because of it, the son of a Columbia University professor and a movie director is campaigning as a socialist intent on…