A high-stakes trial began Monday in a California courtroom over whether the Trump administration violated federal law when it deployed thousands of National Guard troops and United States Marines to Los Angeles following protests over immigration raids in June.

At an extraordinary news conference on Monday, President Donald Trump revealed plans to take over the Washington, D.C. police department and deploy National Guard troops in the nation's capital to combat what he says it rampant violent crime that statistics show is actually decreasing.

Trump mentioned New York, Baltimore, and Oakland as other cities where he wants to put the police under federal control. “This will go further," he said.