Ya think relations between the mayor and the police are strained?

New York City’s police union, the Patrolmen’s Benevolent Association, is urging its members to ban Mayor Bill de Blasio from their funerals, the latest episode in the ongoing clash between the mayor and the city’s law-enforcement power structure.

Officers are encouraged to fill out a form on the union’s website titled “Don’t Insult My Sacrifice” to request that neither de Blasio nor Council Speaker Melissa Mark-Viverito attend their funeral, should they be killed in the line of duty.