Dennis Michael Lynch, whose work focuses on the border and illegal immigration, appeared on the show to discuss immigration.
"I would guarantee you, in fact I would bet my life on the fact -- your last guest just said about ISIS coming into America -- I would guarantee you, they're already here," Lynch said. "I have worked in the desert and I have caught these people before and I've seen Qurans, prayer rugs, you name it. They're already here."
Watch video via Fox. Lynch's comments come at about the 2-minute mark: