U.S. Sen. RonJohnson (R-WI) weighs in on U.S. Customs and Border Protection’s letter warning of possible attempts by Hamas fighters to cross the southern border. "You think that there might be a bad person or two, a terrorist or two in that 1.7 million people? It's just actually gob smacking to have the administration only now come out and realize, 'Hey, we might have a problem here,'" says Sen. Johnson.