Speaking at a Black church in Brooklyn last September, Andrew Cuomo tested the message that would quickly become the centerpiece of his campaign to be mayor of the country’s largest city. “We’re on the decline,” the former New York governor said . “Things are getting worse; quality of life is getting worse. Things are feeling out of control.” The subtext was barely that: New York City was increasingly broken and lawless, and it needed an experienced leader at the helm.  Ever since he was