From the OP article:
"Can Trump actually order such a domestic deployment? Under the Insurrection Act of 1807, yes, and it has been done before. In fact, that’s precisely what happened in the Rodney King riots in Los Angeles. Technically speaking, the law requires an actual “insurrection, domestic violence, unlawful combination, or conspiracy,” but Walz’ comments make that a fairly easy case for the White House to make. It also requires that the emergency deprives US citizens of “a right, privilege, immunity, or protection named in the Constitution and secured by law,” and that “the constituted authorities of that State are unable, fail, or refuse to protect that right, privilege, or immunity, or to give that protection.” Right now, that sounds like a very good description of Minnesota’s position, as businesses burn and the state orders citizens to remain in their homes while disorder prevails."