The military should never be used for domestic law enforcement.
Think about what you are saying! Do you think the police are equipped or adequately trained to protect our canals, power plants, reservoirs, nuclear power facilities, the power distribution grid, refineries, and dams? You will need the military to protect these if this war really takes hold as expected. Let's not make foolish decisions.
What is the definition of is?
Does domestic refer to the location of the arrest or the nationality of the suspect.
Defining domestic as pertaining to location would seem to preclude the defense of the nation if foreign invaders could get a foot on US soil. Seems to me that this legislation is redundent since our military already posses the power that Ridge et al are seeking.
Actually, I suspect they CAN be used today, and legally, IF they are used in conjunction with the local law enforcement authorities. IF the local Sheriff is along, he can "deputize" them as needed to take the necessary actions.
No expansion of "military powers of arrest" is necessary or desirable.