We have this unfortunate habit in the United States of dividing terrorism into different categories. External, foreign terrorism, which manifests itself overseas or in the United States, or domestic terrorism.

ISIS is going to devolve from physical political emirate, into what Al Qaeda was, which is a covert organization which will go completely underground. But to communicate and to keep propagating their propaganda, after everyone is dead, all their fanboys and whatever surviving leadership that has been operating outside the war or operates in Somalia, Yemen, and Afghanistan, they will form what we call a "ghost caliphate."

Most ISIS members are irreconcilable. Once they've bitten that bug, that cultish bug, they would prefer to die. They're going to be given the opportunity, no one's going to get out alive from Iraq and Syria now. They make sure everyone's a suicide bomber now.

Trump doesn't understand the counterintelligence process. Take, for example, Carter Page. He's been appearing on television and acting as though the U.S. intelligence community monitoring his activities in Russia and suspicions that he may have been in league with Russian intelligence is an affront.

We have this unfortunate habit in the United States of dividing terrorism into different categories. External, foreign terrorism, which manifests itself overseas or in the United States, or domestic terrorism.

There is no difference between an ISIS gunman and an American gunman that goes into a mosque, or the gunman Baruch Goldstein who went into the mosque in Bethlehem and killed 29 guys about fifteen years ago. Goldstein took his service weapon and tried to kill everybody in the mosque. He shot over a hundred people. There's no monopoly on terrorism. Terrorism experts know this and we live according to that.

Law enforcement does counter political extremism here in the United States in the exact same way that they do political extremists who are infiltrated into the United States, who may come from a religious motivation, as we saw overseas in Europe. But the same methodologies have to be used.