"How Trump and his advisers intend to staff such a program would make a prospective Trump deportation campaign even more volatile. Stephen Miller, Trump’s top immigration adviser, has publicly declared that they would pursue such an enormous effort partly by creating a private red-state army under the president’s command. Miller says a reelected Trump intends to requisition National Guard troops from sympathetic Republican-controlled states and then deploy them into Democratic-run states whose governors refuse to cooperate with their deportation drive.
Such deployment of red-state forces into blue states, over the objections of their mayors and governors, would likely spark intense public protest and possibly even conflict with law-enforcement agencies under local control. And that conflict itself could become the justification for further insertion of federal forces into blue jurisdictions, notes Joseph Nunn, a counsel in the Liberty & National Security Program at the Brennan Center for Justice at NYU Law School."