We're at war with the ISIS caliphate that sprang up because Hillary Clinton and Barack Obama precipitously withdrew all American forces from Iraq and created a vacuum of power, that ISIS was able to overrun vast territories that our soldiers had won in Operation Iraqi Freedom.

A republic - if you can keep it - is about limitation, and for good reason, because we are mortal and our actions are imperfect.

We provide an enormous amount of resources, particularly with regard to military resources, to countries all over the world. And in many cases, those countries are not compensating the American taxpayer for the commitment that we're making to their security.

As a conservative who believes in limited government, I believe the only check on government power in real time is a free and independent press. A free press ensures the flow of information to the public, and let me say, during a time when the role of government in our lives and in our enterprises seems to grow every day--both at home and abroad - ensuring the vitality of a free and independent press is more important than ever.

Power is an instrument of fatal consequence. It is confined no more readily than quicksilver, and escapes good intentions as easily as air flows through mesh.

[J.F Kennedy] was a congressman and a senator and he would go on to be president. I had that idea as a little boy, and I used to joke to people but nobody told me that his father was ambassador to England and that he was a war hero, and he was, you know.

[Donald Trump] put this issue at the center of this presidential campaign in the Republican primaries. And his position and his principles have been absolutely consistent. We're going to secure the border. We're going to build a wall, have a physical barrier. We're going to enforce the laws of this country, end sanctuary cities, implement E-Verify.