Donald Trump has long pledged to deport millions of people, but he's bringing more specifics to his current bid for the White House: invoking wartime powers, relying on like-minded governors and using the military.
Trump's record as president shows a vast gulf between his ambitions and the legal, fiscal and political realities of mass deportations of people in the United States illegally -- 11 million in January 2022, by the Homeland Security Department's latest estimate.
Former President Barack Obama carried out 432,000 deportations in 2013, the highest annual total since records were kept.
Reporting from San Diego, Elliot Spagat of The Associated Press learned that deportations under Trump never topped 350,000. But he and his chief immigration policy architect, Stephen Miller, have offered clues in interviews and rallies of taking a different approach if they are returned to power in November.
They could benefit from lessons learned during their of four years in office and, potentially, from more Trump-appointed judges.
"What Trump seems to be contemplating is potentially lawful," said Joseph Nunn, counsel at the Brennan Center for Justice at New York University's School of Law. "There might not be a lot of legal barriers. It is going to be logistically extraordinarily complicated and difficult. The military is not going to like doing it and they are going to drag their feet as much as they can, but it is possible, so it should be taken seriously."
The Trump campaign, asked how his pledge would be carried out, said Trump would begin the largest deportation program in U.S. history, without elaborating in detail.
Karoline Leavitt, a spokeswoman, said Trump "would marshal every federal and state power necessary to institute the largest deportation operation of illegal criminals, drug dealers, and human traffickers."
Trump has said he would invoke the Alien Enemies Act, a 1798 law that allows the president to deport any noncitizen from a country that the U.S. is at war with.
Texas Gov, Greg Abbott has advanced a theory that illegal immigration amounts to an invasion to justify state enforcement measures, so far without success, but legal scholars say judges may be reluctant to second-guess what a president considers a foreign aggression.
The sweeping Alien Enemies Act authority may sidestep a law that bans the military from civilian law enforcement.
Trump has said he would focus on deploying the National Guard, whose troops can be activated on orders of a governor. Miller says troops under sympathetic Republican governors would send troops to nearby states that refuse to participate.
"The Alabama National Guard is going to arrest illegal aliens in Alabama and the Virginia National Guard in Virginia. And if you're going to go into an unfriendly state like Maryland, well, there would just be Virginia doing the arrest in Maryland, right, very close, very nearby," Miller said last year on "The Charlie Kirk Show."
Ease up, Ripley. You're just grinding metal.