President Donald Trump is moving swiftly to act on his immigration promises with little internal restraint, determined to test the bounds of his executive authority in order to fulfill the promises of his reelection campaign.

Trump's escalation of immigration arrests by shifting into workplaces ignited clashes between protesters and officers in the immigrant-heavy city.

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

Dozens arrested in Los Angeles as anti-ICE protests turn violent, with charges including assault on police and attempted murder as National Guard troops deploy.