A federal judge ruled Thursday that President Trump illegally federalized the California National Guard in response to the Los Angeles protests and ordered that the force be returned to the control of Democratic Gov.

California Gov. Gavin Newsom had sued Trump in an attempt to block the deployment of federal troops in the city, which Newsom has called a “serious breach of state sovereignty.”

Senior U.S. District Court Judge Charles R. Breyer said he was “trying to figure out where the lines are drawn.”