DHS chief contradicts Duncan Hunter: No, ISIS hasn't entered U.S.

Johnson said those claims aren’t supported by “credible, specific intelligence to that effect.” He said public officials should “be responsible in what we decide to share with the American public, so that the public is informed.”

His comments came after a Homeland Security spokeswoman called Hunter’s statement “categorically false.”

“I look at the intelligence reports from overseas, from our southern border, from our intelligence community virtually every day, numerous times a day, to be on the lookout for something of that nature,” Johnson said.