The Iranian regime has agreed not to have nuclear weapons, President Donald Trump told the New York Post's "Pod Force One" podcast — but he added that Tehran could still "change their mind."

"I did have to say we have to do something about Iran, because regardless of how well we're doing [economically] we can't let them have a nuclear weapon," he said in the interview, which was published Wednesday. "They've already agreed they're not going to have a nuclear weapon."