A federal judge has questioned the Trump administration's authority and need to maintain command of California National Guard troops it first deployed to Los Angeles in June following violent protests. At a hearing in San Francisco on Friday, U.S. District Judge Charles Breyer suggested conditions in Los Angeles had changed since the initial deployment, and he questioned whether the administration could control state Guard troops forever. California officials have asked Breyer to issue a preliminary injunction returning control of remaining California National Guard troops in Los Angeles to the state. Breyer did not immediately rule. Justice Department Attorney Eric Hamilton said the remaining troops in Los Angeles were allowing immigration agents to continue their mission.