President Trump said Tuesday that he’ll expand his use of the National Guard to an additional city to help combat crime and unrest, adding that an announcement could be imminent. “We’re going to be announcing another city that we’re going to very shortly, working it out with the governor of a certain state [who] would love us to be there and the mayor of a certain city,” Mr. Trump told reporters. “We’ll announce it probably tomorrow and it’s going to be something we will do like we did here,” Mr. Trump said, referencing his deployment of the National Guard to...