We didn't take the words of Vladimir Lenin seriously until Communism spread across the globe. And unfortunately, the president didn't take the words of groups like ISIS seriously until they established a sweeping self-proclaimed Islamic Caliphate.

I take ISIS at its word. When they said, in their words, 'We'll use and exploit the refugee crisis to infiltrate the West,' that concerns me.

a notoriety that has spread all over the globe.

A Trump administration will take on this fight and send a clear message to the Islamist terrorists: you may have fired the first shot, but rest assured, America will fire the last.

I know there's a lot of discussion about building a 2000-mile wall. I think we need to complete the Secure Fencing Act, but we need greater technology and aviation aspects down on the Southwest border so we can see the threat from the sky. Until you can see it, you don't know where it's coming from and how to correctly stop it.

The threat is real, and it comes from the Internet. This is a new generation of terrorist. This is not Bin Laden in caves with couriers anymore. This is what the new threat of terrorism looks like.