Los Angeles residents and experts say the National Guard's presence in Los Angeles in response to immigration protests is reminiscent of a long-standing dynamic in the state and around the country.

U.S. President Donald Trump can keep his deployment of National Guard troops in Los Angeles, according to a court ruling, as protests against immigration raids look set to enter their second week in the strongest backlash since his return to power in January.

The National Guard has at times detained protesters in its deployment to Los Angeles, an official said Wednesday, as demonstrations against Immigration and Customs enforcement raids spread to other major cities.

WSJ's Katherine Sayre reports from downtown Los Angeles where thousands are taking part in anti-Trump demonstrations outside City Hall.

As the military presence ramped up in Los Angeles, communities are preparing for the largest protests against Trump since he took office.

Reuters, the news and media division of Thomson Reuters, is the world’s largest multimedia news provider, reaching billions of people worldwide every day. Reuters provides business, financial, national and international news to professionals via desktop terminals, the world's media organizations, industry events and directly to consumers.

About 500 of the National Guard troops deployed to the Los Angeles protests have been trained to accompany agents on immigration operations, the commander in charge said Wednesday.

The request from Homeland Security, confirmed by a Defense official, also seeks “drone surveillance support,” direction to troops on detaining or arresting “lawbreakers,” and graduates from an organization like the Marines’ School of Advanced Warfighting School for setting up a joint operation center.