This is highly irregular and unethical. It is sedition. These lawmakers are telling the military to defy orders they don't agree with and which they think are unlawful. "The Insurrection Act gives the President the authority to use the military in certain circumstances to suppress any, “Insurrection, domestic violence, unlawful combination, or conspiracy” that he or she determines is in violation of federal law." These legal technicalities make it difficult to tell if an order to deploy against U.S. residents is illegal. Get ready for Court-Martials.