Campaigning in Iowa this year, Donald Trump said he was prevented during his presidency from using the military to quell violence in primarily Democratic cities and states. Calling New York City and Chicago “crime dens,” the front-runner for the 2024 Republican presidential nomination told his audience, “The next time, I’m not waiting. One of the things I did was let them run it and we’re going to show how bad a job they do,” he said. “Well, we did that. We don’t have to wait any longer.” Trump has not spelled out precisely how he might use the military during a second term, although he and his advisers have suggested they would have wide latitude to call up units, the Associated Press reports. While deploying the military regularly within the country’s borders would be a departure from tradition, the former president already has signaled an aggressive agenda if he wins, from mass deportations to travel bans imposed on certain Muslim-majority countries.
A law first crafted in the nation’s infancy would give Trump as commander in chief almost unfettered power to do so, military and legal experts said in a series of interviews. The Insurrection Act allows presidents to call on reserve or active-duty military units to respond to unrest in the states, an authority that is not reviewable by the courts. One of its few guardrails merely requires the president to request that the participants disperse. “The principal constraint on the president’s use of the Insurrection Act is basically political, that presidents don’t want to be the guy who sent tanks rolling down Main Street,” said Joseph Nunn, a national security expert with the Brennan Center for Justice. “There’s not much really in the law to stay the president’s hand.”