In an appearance on "Fox News Sunday," the real estate mogul said that since he's "extremely, extremely tough on immigration" the attackers wouldn't have been in position to commandeer U.S. flights.
"So there's a good chance that those people would not have been in our country," Trump said.
He took another shot at Jeb Bush for claiming that Bush's brother, the 43rd president, kept the nation safe.
"I'm not blaming George Bush," Trump said. "But I don't want Jeb Bush to say, 'My brother kept us safe,' because September 11 was one of the worst days in the history of this country."
