We almost certainly have opposing ideological views, but something I said a lot during this era (that I'm happy to see you hinting at) was that if you come into office as a progressive prosecutor without any plan to deal with the people in your office or in law enforcement who aren't on board, then that's really the more immediate failure. You can't just say, "I would have been successful if not for my detractors," because the detractors are a totally predictable obstacle for which you need a plan.

In big systems you can't always just do whatever you want!