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, an immoral act, an unconstitutional act.” This appears to be the first time in decades that a state’s National Guard was activated without a request from its governor.

Trump has cited a legal provision that allows him to mobilize federal service members when there is “a rebellion or danger of a rebellion against the authority of the Government of the United States.” Roughly 300 National Guard members arrived in the city over the weekend , and Trump said he had authorized 2,000 members to deploy if needed.

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