Not having local government on their side is going to severely hamper the police. I can definitely see them making arrangements with local or even out-of-town Neo-Nazis, but if the violence continues isn't there a very real possibility of the governor calling up the National Guard?
This may not actually be the worst solution, given that the army is a whole lot more strict on the situations where you can fire back and kill civilians (I'm not going to claim the US military has anywhere near a perfect record in this regard, but between the two, I'd rather be taken by your military than your police any day of the week, in most jurisdictions). The guard's going to be more racially mixed as well, especially on the front-line units, and hasn't recently been killing black Americans, all factors that may actually work in their favour.
On the other hand, sending in the army worked out really, really poorly in Northern Ireland. It's an escalation, a provocation and it will depend how the Guard would interface with the local police and what the response from the militia movements would be as to how that plays out. If the local police are "equal partners" with them, then you can bet the police will try and turn that to their advantage, which will pit the rioters and protestors against them. And if not, the police may try and spin up the militia crazies with the usual NWO/military takeover crap, especially with a Dem governor.