The NYPD has many unions, depending on what rank you are. By far the largest union, the PBA, endorsed Bill Thompson during the last mayoral election. Thompson lost in the primary to DeBlasio. The PBA did not endorse DeBlasio during the general election. The turnout was so low and few cops live within the 5 boroughs that almost no cops voted for DeBlasio.
Thanks for posting this information! I was wondering about this too. Although I blame the citizens of NYC for electing a known marxist/communist as their mayor, it's refreshing to know that the PBA did not endorse de Blasio. The citizens of NYC deserve what they get for electing this clown, but those who protect said citizens, in the NYPD, never wanted him as mayor in the first place and you can plainly see why.