John Kerry knows more about more subjects than an awful lot of people. But I think it's a very hard job [Secretary of State].

What people have the capacity to choose, they have the ability to change.

I do think that she [Hillary Clinton] will prove that she's the best, whether she's in the White House or somewhere else. I think it will very much be a historic moment, when we are able to say that we actually have done something like put a woman in the White House. Its very interesting to think about considering its taken us long as it has.

Our strategic dialogue with China can both protect American interests and uphold our principles, provided we are honest about our differences on human rights and other issues and provided we use a mix of targeted incentives and sanctions to narrow these differences.

I hope I'm wrong, but I am afraid that Iraq is going to turn out to be the greatest disaster in American foreign policy - worse than Vietnam, not in the number who died, but in terms of its unintended consequences and its reverberation throughout the region.

I think that we all know what evil is. We have a sense of what's evil, and certainly killing innocent people is evil. We're less sure about what is good. There's sort of good, good enough, could be better - but absolute good is a little harder to define.

NATO has been a thread throughout my life.