Afghanistan, Oct. 29 -- Donald Trump said U.S. law clearly prevents a third presidential run and indicated he will not challenge the two-term constitutional limit.

U.S. President Donald Trump said he is legally prevented from running for president a third time, acknowledging the constitutional limit on presidential terms.

Speaking to reporters aboard Air Force One en route to South Korea, Trump said the law was "very clear" and that he had no plans to challenge it.

"If you read the law, it is completely clear that I am not allowed to run. It is a shame," he told journalists during the flight.

Trump has previously suggested he could remain in office beyond two terms, remarks that drew criticism from political opponents and constitutional...