If President Trump deploys troops to other American cities, experts say it would be a clear departure from founding principles and invite a legal challenge.

Lawyers for President Trump and Gov. Gavin Newsom faced off over the National Guard deployment in Los Angeles — and debated whether they were subject to a "constitutional exception.

The lawyer said evidence presented from the landmark trial that began on Monday showed that soldiers had violated a 19th century law that bars the military from civilian law enforcement. “The government wanted a show of military force so great that any opposition to their agenda was silenced,