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.

US President Donald Trump is pushing the bounds of military activity on American soil, but a 150-year-old law could spell trouble for his plans.

President Trump mentioned New York, Baltimore, Chicago and other cities as places where he may deploy the National Guard to crack down on crime.