California sued the Trump administration on Monday over its decision to send in National Guard troops in response to protests over immigration enforcement, calling it an unconstitutional use of executive power that usurped the state’s authority.

U.S. officials said about 1,000 National Guard members were in the city under federal orders by midday Monday.

Anti-ICE demonstrations are expected to spread to more cities this week after days of unrest in Los Angeles, with at least 30 new protests planned across the country in response to the Trump Administration’s recent immigration raids.