National Guard against National Guard isn't a solution, it's an escalation into Civil War II.
Voting trends among cops and military enlisted pretty heavily skew Trump last I checked, regardless of the state's general affiliation. Nightmare scenario is that basically every org structure either defects to red entirely or is sabotaged into operational ineffectiveness by a minority of traitors.
I would not trust anyone in uniform to be on my side as things start to slide.
They wont make it a total free for all, they'll still want their victims as defenseless as possible. I would not be surprised if gun stores start asking for proof of Party affiliation before any purchase. Courts will say "private business nothing we can do lmao."