I’ve just discovered Jacobin; a magazine of the far left, through this article shared to BackTalk by EasttoMidwest, and originating with Gawker commenter CrtAltDefeat.

https://www.jacobinmag.com/2015/07/black-…

It’s an analysis of why police unions are antithetical to the labor movement, and should be considered separately when discussing unions, and public sector unions.

One pithy statement that I think sums it up;

Police unions are “agents of oppression [in] a movement founded on fighting it”.