I have looked at public opinion polls in France in the late 1940s and early 1950s during the height of Marshall Plan aid. They had a very negative attitude towards the United States then. There were negative attitudes towards the United States because of Vietnam. There were negative attitudes about the United States when Reagan wanted to deploy intermediate range ballistic missiles. I don't think the president should base his foreign policy on American public opinion polls, let alone foreign public opinion polls.

Iran has essentially mastered all of the complex science and technology that they need to have a completely indigenous nuclear weapons program. That means that our options on Iran are extremely limited, to regime change or as a last resort, the use of force.

A lot of people have said to me, 'That's a great idea, running for president. You'll get booked for more speeches. You can write a book.'

I think it's critical that we return national security issues to the center of the overall political debate in America.

The only thing that will stop Iran from getting nuclear weapons is regime change in Tehran.

I think the regime in North Korea is more fragile than people think. The country's economic system remains desperate, and one thing that could happen for example would be under a new government in South Korea, to get the South Korean government to live up to its own constitution, which says any Korean who makes it to South Korea, is a Korean citizen. A citizen of the Republic of Korea. And you could imagine the impact that would have inside North Korea if people thought, "If I could get out and make it to South Korea, I could have a different life."

It was right to overthrow Saddam Hussein. It was the regime itself that was a threat. I think in hindsight, what I would have done is turn authority back over to Iraqis much more quickly and say: "Your country, you figure out how to run it."