Republican presidential frontrunner Donald Trump's harsh anti-Islam rhetoric is so concerning that on ABC's This Week, host Jonathan Karl had to check and see just how far it might go. He directly asked the business mogul if he could rule out establishing internment camps for Muslims in the U.S.
Trump said he ruled it out, but added: "We're going to have to be very smart. We're going to have to be very rigid and very vigilant. And if we're not very, very strong and very, very smart, we have a big, big problem coming up," he said. "We've already had the problem. Check out the World Trade Center, okay, check out the Pentagon. We've already had the problem."
Trump also called on Muslims in the U.S. to report "bad acts."