http://www.slate.com/articles/news_and_politics/crime/2015/01/nypd_and_bill_de_blasio_why_new_york_s_mayor_was_wrong_to_count_on_police.html

The New York Times reported this week that New York Mayor Bill de Blasio was caught off guard by just how deep the animosity toward him had grown among the city’s police officers. Though he’d run on a platform of reforming the NYPD and putting an end to its stop-and-frisk policy, de Blasio had apparently arrived in office confident he would avoid any lasting discord with the rank and file. It wasn’t until police protests in the wake of the killing of two NYPD officers last month that the mayor realized he had meaningfully lost the support of the cops.