That is what the National Guard is for! Most, as I was once a member, are always in a state of readiness and can be called up by the Governor if it cannot be controlled by civil law enforcement.
Yes but NG and USMil has basically the same capabilities. They are just under different command. However in practice, you have NG fighting together with USArmy in Iraq etc.. under Fed Command, I don’t think the Governor of a state commands NG Units in Iraq. My point is as far as that law is concerned in reality NG and USMil is the same thing.