“Almost immediately after the event, it began to seem that a third casualty might be the national protest movement focused on policing and racial injustice that had assumed, in recent weeks, the moral force of a fundamental civil rights issue.” The murder of two police officers in New York City resulted in a series of political maneuvers and protests that may have upended a national movement. Michael Greenberg takes a look at how we got here: The NY Police vs. the Mayor.

+ The Daily Beast: The NY Police Union’s Civil War.