U.S. Attorney General Pam Bondi has threatened to send federal law enforcement — and potentially the National Guard — into Washington state and Seattle if leaders don’t comply with federal immigration demands.Governor Bob Ferguson and Seattle Mayor Bruce Harrell are firing back, vowing to defend the state’s sanctuary policies in court. But could the federal government legally deploy the Guard? What does history tell us about similar moves under the Posse Comitatus Act and the Insurrection Act?