President Donald Trump has once again floated the possibility of returning to the White House for a third term, and legal scholars are debating whether a constitutional loophole could make it possible.

“A lot of people want me to do it,” Trump told NBC’s Kristen Welker on Sunday when asked about running again. “I’m not joking,” he added, claiming there are “methods” that could allow him to serve beyond the two terms allowed under the Constitution. When pressed aboard Air Force One on Sunday, Trump declined to say whether he plans to step down on Jan. 20, 2029.