Trump's escalation of immigration arrests by shifting into workplaces ignited clashes between protesters and officers in the immigrant-heavy city.

President Trump issued a memo authorizing the National Guard to post up in Los Angeles, but California Gov. Gavin Newsom has called it "illegal."

The last time the National Guard was activated without a governor’s permission was in 1965, when President Lyndon B. Johnson sent troops to protect a civil rights march in Alabama.

U.S. officials said about 1,000 National Guard members were in the city under federal orders by midday Monday.

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