President Donald Trump said on Monday he would support the arrest of California's Gavin Newsom, in a dramatic escalation of a growing conflict with the Democratic governor over immigration protests that roiled Los Angeles over the weekend.

The last time the National Guard was activated without a governor’s permission was in 1965, when President Lyndon B. Johnson sent troops to protect a civil rights march in Alabama.

Newsom filed suit against the White House on Monday over its decision to deploy the National Guard. California Attorney General Rob Bonta says the state’s sovereignty was “trampled” by President Donald Trump when he ordered National Guard troops to the immigration protests in Los Angeles, The Associated Press reported.