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.'

The North Koreans will sell anything to anybody for hard currency. If Al Queda came up with enough dollars to buy a nuclear weapon from North Korea I don't have any doubt that the North Koreans would sell it to them.

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.

There's no such thing as the United Nations. If the U.N. secretary building in New York lost 10 stories, it wouldn't make a bit of difference.

Negotiation is not a policy. It's a technique. It's something you use when it's to your advantage, and something that you don't use when it's not to your advantage.

The real issue of dealing with proliferation of weapons of mass destruction: nuclear, chemical or biological is: What is your tolerance for risk? And my tolerance for risk for WMD proliferation is pretty close to zero. Because otherwise, we and our allies are at the mercy of regimes like Ahmadinejad and the mullahs in Tehran, or Kim Jong Il and the Hitler-in-the-bunker mentality in Pyongyang, or others who don't share our calculus on the value of human life.

Our biggest national security crisis is Barack Obama.