Israel is a true friend. It is our greatest ally in the region. And if Israel is attacked, America will stand with Israel. I've made that clear throughout my presidency.

It's hard to anticipate. I can tell you what I'm feeling right now is that I'm busier than I expected these last two weeks. A great deal of emotion around the people that I've worked with and the gratitude I feel for the sacrifices they've made on behalf of the American people, but also on behalf of me personally.

I try to make it a rule not to meddle in other people's politics.

In Texas, we hold very dear to intrusions against our personal liberty. We fight very hard against that.

The campaign was a more significant training ground than I think people give it credit for. By the time I got here, I think I had a pretty good sense of what was required. But the circumstances in which I came in were different than most executives, right? The enterprise was in the midst of a major crisis.

A central notion in the Affordable Care Act was we had an inefficient system with a lot of waste that didn't also deliver the kind of quality that was needed that often put health care providers in a box where they wanted to do better for their patients, but financial incentives were skewed the other way... We don't need to reinvent the wheel; you're already figuring out what works to reduce infections in hospitals or help patients with complicated needs.

We have to be successful at the cutting-edge industries of the future like Twitter. But we also have always been a country that makes stuff.