Newsom made clear that he wouldn't be cowed by threats from the White House official.

Gov. Gavin Newsom’s office, in a letter to the Trump administration, called the deployment of troops “unlawful” and a “serious breach of state sovereignty.”

Border czar Tom Homan confirmed to NBC News that he would arrest Gov. Gavin Newsom and Los Angeles Mayor Karen Bass if they interfered with immigration raids.

Newsom made clear that he wouldn't be cowed by threats from the White House official.

"Lo zar dei confini di Trump minaccia di arrestarmi per aver parlato apertamente. Vieni a prendermi, duro. Non me ne frega niente. (ANSA)

"Lo zar dei confini di Trump minaccia di arrestarmi per aver parlato apertamente. Vieni a prendermi, duro. Non me ne frega niente. (ANSA)

California governor throws down gauntlet to Tom Homan as he rages against administration’s intervention in Los Angeles unrest, accusing president of ‘manufacturing a crisis’

California governor plans to sue Trump administration over deployment of 2,000 national guard troops to LA which he called ‘an illegal act’

Donald Trump evoca l'arresto di Gavin Newsom per la sua opposizione all'uso della guardia nazionale contro le proteste per i raid anti immigrati. (ANSA)

Donald Trump evoca l'arresto di Gavin Newsom per la sua opposizione all'uso della guardia nazionale contro le proteste per i raid anti immigrati. (ANSA)

President Donald Trump said he would support arresting California Gov. Gavin Newsom and called the rioters in Los Angeles 'insurrectionists.'

Trump lashed out at Newsom - who has been tipped as a possible 2028 presidential candidate - over unrest, saying: ‘He’s done a terrible job’.

"This is a day I hoped I would never see in America," the California governor said on social media.

President Donald Trump has called for the California governor's arrest over trying to block the deployment of the National Guard.

Gov. Gavin Newsom (D) took issue with Trump adviser Stephen Miller's criticism after the California Democrat called on the president to rescind his order to deploy the National…

Democrat Gavin Newsom has not been afraid to square off against the president - but this confrontational strategy is not without political risk.