We should be more modest in our belief that we can impose democracy on a country through military force.

I think there are a whole host of things that are civil rights, and then there are other things - such as traditional marriage - that, I think, express a community's concern and regard for a particular institution.

Congress should fund research on the effects that violent video games have on young minds... We don't benefit from ignorance. We don't benefit from not knowing the science.

If you've got a business, you didn't build that. Somebody else made that happen.

There's just a whole different attitude and vibe when you're not in power as when you're in power.

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.

When you're a candidate and you say something that is inaccurate or controversial, it has less impact than it does when you're president of the United States. Everybody around the world's paying attention. Markets move. National security issues require a level of precision in order to make sure that you don't make mistakes.