A federal judge in San Francisco is weighing whether the Trump administration violated federal law by sending National Guard troops to accompany federal agents on immigration raids in Southern California.

Trump announced plans on Monday to send 800 National Guard troops to Washington D.C., as his California guard deployment is on trial.

The multiday hearing started as President Donald Trump announced he would send 800 troops to Washington, D.C., to address violent crime.

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.

A federal judge in San Francisco will hear arguments on whether military troops deployed this summer by the Trump administration to Los Angeles violated a federal law that bars troops from conducting

Attorneys for Gov. Gavin Newsom headed back to court Monday over President Donald Trump ’s use of the California National Guard to subdue protests in Los Angeles, a tactic the White House is now repeating in the nation’s capital in what’s it’s calling a crime crackdown.

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.

President Trump's military interventions in Los Angeles and Washington, D.C., foretell his plan for other cities. The Washington Post recently reported on the Pentagon's plans for a "quick reaction force" to deploy amid civil unrest.