A federal officer stands guard in the Brighton Park neighborhood of Chicago on Saturday, after protesters learned that U.S. Border Patrol shot a woman that morning in the city's southwest.

U.S. President Donald Trump authorized the deployment of 300 Illinois National Guard troops to protect federal officers and assets in Chicago on Saturday, marking the latest escalation of his use of federal intervention in cities.

But the same day, a similar mobilization of 200 National Guard troops in Oregon was temporarily blocked after a federal judge found Trump was likely overstepping his legal authority in responding to relatively small protests near a U.S. Immigration and Customs Enforcement building in Portland.

Trump voiced his frustration on Sunday morning about the ruling by U.S. District

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