A federal judge is hearing arguments 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.

Gov. Gavin Newsom alleges the Trump administration broke a 19th Century law called the Posse Comitatus Act when it deployed military units to Los Angeles in June.

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.