In a Truth Social post, the U.S. president said his move was based on the "tremendous interest" in the subject, without providing additional details.

President Trump says Barack Obama would be wise to keep his mouth shut about aliens ... 'cause he says Obama gave out top secret information on a podcast where Obama said extraterrestrials were real.

The Prez says he doesn't have an opinion on the existence of extraterrestrial life -- Obama says the size of the universe makes the chances pretty good -- but admits lots of folks believe in aliens.