With only 2 percent of the world's oil reserves, oil isn't enough. This country needs an all-out, all-of-the-above strategy that develops every available source of American energy. A strategy that's cleaner, cheaper, and full of new jobs.

ISIL is a terrorist organization, pure and simple. And it has no vision other than the slaughter of all who stand in its way.

But what I would say to my successor is that it is important not just to shoot but to aim. And it is important, in this seat, to make sure that you're making your best judgments based on data, intelligence, the information that's coming from your commanders and folks on the ground and you're not being swayed by politics.

We still have sanctions on Iran for its violations of human rights, for its support of terrorism and for its ballistic missile program. And we will continue to enforce these sanctions vigorously. Iran's recent missile test, for example, was a violation of its international obligations.

For decades, our differences with Iran meant that our governments almost never spoke to each other. Ultimately, that did not advance America's interests.

I am not opposed to all wars. I'm opposed to dumb wars.

Going back to the discussion we were having about immigration reform, some of the most challenging discussions I've had are with activists who essentially would argue that any immigrant from Central America, let's say, who gets here to this country should be allowed to stay because their country is dangerous, their country is poor, and the opportunities for that mom and that kid are much greater here, and why would you send them back?