How can Trump use the national guard on US soil?

Trump ordered the deployment of 4,000 national guard and 700 marines to LA amid Ice protests - here's what to know

Donald Trump's administration has ordered the deployment of 4,000 national guard members and 700 marines in response to protests against deportation operations in Los Angeles.

The deployment of soldiers into the city comes despite the objections of local officials and the California governor, and appeared to be the first time in decades that a president activated a state's national guard without a request from its governor.