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.

A federal judge in San Francisco seemed unconvinced after a three-day trial that the continued deployment of federalized members of California’s National Guard — who were originally deployed to Los Angeles in response to protests against President Donald Trump’s immigration agenda — is lawful.

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

A federal judge heard arguments this week on whether military troops deployed this summer by the Trump administration to Los Angeles violated a federal law that bars troops from conducting law enforcement duties within the country.

Three-day trial will determine if the government violated a 19th century law that bars the military from civil law enforcement

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.

President Donald Trump’s administration federalized California National Guard members and sent them to the second-largest U.S. city over the objections of Democratic Gov. Gavin Newsom and city leaders, after protests erupted June 7 when Immigration and Customs Enforcement officers arrested people at multiple locations.