Police declared all of downtown Los Angeles to be an unlawful assembly area and ordered protesters to go home on Sunday night after a third day of violence hit demonstrations against President Donald Trump's immigration policy.

National Guard troops arrived in downtown Los Angeles on Sunday after being ordered into the city by President Trump in response to a weekend of violent clashes between law enforcement officers and protesters triggered by immigration enforcement operations in the area on Friday.

The National Guard was deployed in Los Angeles Sunday morning as President Trump responded to days of protest against federal immigration raids. Now, questions are being raised about the legality of the president mobilizing the guard without a request from the state's governor.