Los Angeles residents and experts say that the National Guard's presence in Los Angeles in response to immigration protests is reminiscent of a longstanding dynamic in the state and around the country.

Trump has not invoked the Insurrection Act, which is the main legal tool a president can use to activate the military or National Guard when there is rebellion or unrest. But he hasn’t ruled it out, either. “Depends on whether or not there’s an insurrection,” Trump told reporters Sunday after a question about invoking the Insurrection Act.