Almost 5,000 National Guard troops and Marines have been assigned to Los Angeles — drawing stiff rebukes from state officials.

The forces have been trained in deescalation, crowd control and standing rules for the use of force, Northern Command said.

California Governor Gavin Newsom, a Democrat, told MSNBC that he plans to file suit Monday against the Trump administration to roll back the National Guard deployment, which he called “an illegal act,...