I think it's a mistake to rely too much on any one economic factor. It's why investors try to spread their portfolio round.

I wish there were somebody I could be comfortable voting for. I might have to vote for Hillary Clinton, even though I have big reservations about her.

It's hard to conceive that it would take more forces to provide stability in post-Saddam Iraq than it would take to conduct the war itself and secure the surrender of Saddam's security forces and his army. Hard to imagine.

The use of force to liberate people is very different from the use of force to suppress or control them, or even to defeat them.

It's a very bad thing when people exterminate other people, and people persecute minorities.

Putin is behaving in a very dangerous way. And Donald Trump sounds as though he would simply sit back and allow that to go on. I worry about where that would end up.

I told my father I had to try political science for a year. He thought I was throwing my life away.