But sending in the National Guard without a governor’s consent is extremely rare. The most recent comparable example comes from 1965, when President Lyndon Johnson federalised the Alabama National Guard to protect civil-rights marchers from segregationists.

President Trump has long mused about using troops to crush violent protests or riots in blue-state cities. He is now moving to do so in Los Angeles.

The Trump administration said it would send 2,000 National Guard troops into Los Angeles after a second day in which protesters confronted immigration agents during raids of local businesses.

Democrats in Congress and some military and law enforcement officials expressed concern about the plan, which Defense Department officials have not yet approved.

Col. Matthew Groves will take command of the Arkansas Air National Guard on June 6, succeeding Brig. Gen. William Leahy in a ceremony at LRAFB.