I spent over ten years in the Central Intelligence Agency as an undercover operations officer serving overseas after 9/11 where I carried out covert operations against al-Qaeda and other terrorist groups, as well as other countries who are 'hostile to liberty,' as I like to say.

I spent over 10 years in the Central Intelligence Agency, serving overseas, serving in the Middle East. And let me tell you, if you're a terrorist and you want to come to the United States, the worst possible way to do it is as a refugee. You'll go through a year and a half to two years of vetting.

Obviously, having served in wars myself, I'm eager to do everything possible to avoid them, but our military capability vis-a-vis a country like Iran is a major source of leverage in any negotiation that we should never, ever give up.

As far as a wall is concerned, the experts actually say that in some places a wall is necessary, in other places a double wall is necessary, and in other places that a wall wouldn't help. So I'm for whatever it takes to secure our border with Mexico. We've got to do it. I'm for then enforcing our laws.