Presidents don't have the benefit of hindsight. You have to make difficult decisions based on the information that's before you at that moment.

For those who aspire to live in a high cost, high tax, big government place, our nation and the world offers plenty of options. Vermont, Canada and Venezuela all offer you the opportunity to live in the socialist, big government paradise you long for.

We have seen in recent years a large increase in the number of people coming in and cases of people going back, living in Cuba, but still receiving American benefits. That cannot be justified.

We've never been people that go around and confront people that have been financially successful and say, 'We hate you. We envy you because of how well you're doing.'

Let me begin by saying that we have to understand who ISIS is. ISIS is a radical Sunni group. They cannot just be defeated through air strikes. Air strikes are a key component of defeating them, but they must be defeated on the ground by a ground force. And that ground force must be primarily made up of Sunni Arabs themselves, Sunni Arabs that reject them ideologically and confront them militarily.

We will either bring on another American century, or we are doomed to witness America's decline.

I owe a debt to America that I will never be able to repay.