The trial over President Trump's deployment of thousands of National Guard troops to Los Angeles earlier this summer reached its third and final day Wednesday.

Lawyers for President Donald Trump and California Gov. Gavin Newsom are set to face off Monday to determine whether the president violated a 147-year-old law when he deployed the National Guard to quell anti-immigration enforcement protests in Los Angeles – against the wishes of the governor.

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.

ABC7 News reporter Monica Madden was in the courtroom as a federal judge heard arguments on whether the Trump administration violated federal law when it deployed National Guard soldiers to LA following June immigration raid protests.

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.

Why is the federalized National Guard, even though it’s been drawn down, still in place?” a federal judge asked.

In New Mexico’s most populous city, National Guard troops are listening to the police dispatch calls, monitoring traffic cameras and helping to secure crime scene perimeters, tasks not usually part of the job.

An empty boat spotted floating off the coast of California ended the search for a missing 65-year-old fisherman, the Coast Guard said.