If Trump sends the National Guard into cities without the consent of governors, state leaders would be able to file court challenges, as California Governor Gavin Newsom did to block Trump from federalizing the National Guard to quell protests and riots over his immigration policy in Los Angeles earlier this summer, Banks said.

The president’s comments follow his statements Friday when he raised the idea of using the Guard in Chicago, as he previously did in Los Angeles and currently is doing in Washington, D.C.

U.S. President Donald Trump said on Monday that the U.S. military might deploy to Chicago and is ready to go anywhere on short notice to crack down on crime. Citing a purported wave of lawlessness, Trump seized control this month of the police force in Washington,