A fight between President Donald Trump and Democratic Gov. Gavin Newsom over the National Guard's presence in California will come to a head in a three-day trial.

A general has testified that National Guard troops repeatedly rehearsed their role in an operation at a Los Angeles park intended as a show of force against people protesting immigration raids.

The U.S. government’s unprecedented use of National Guard troops in Los Angeles to protect officers carrying out President Donald Trump’s immigration crackdown was illegal and should be ended, a lawyer for the state of California told a federal judge on Tuesday.

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.

A California judge will decide whether Trump broke the law when he deployed troops to quell protests on the streets of Los Angeles.