In announcing the lawsuit, Attorney General Rob Bonta called the president's move to federalize the National Guard an "infringement" on state sovereignty.

It's exceedingly rare for presidents to call up the National Guard in opposition to a governor's wishes, as President Trump did in deploying the National Guard to Los Angeles.

The swiftly evolving situation in the Los Angeles area over protests surrounding immigration enforcement actions has also cued up a public spat between President Donald Trump and Gov. Gavin Newsom, the California governor who has been one of the Republican president's most vocal Democratic critics.