The most profound security threat we face today is global warming....climate change has the capacity to change the way all of us live.

The great thing about not being president anymore is I can say whatever I want, about anything. Of course [now], nobody really cares what I say. And now I have the worst of all worlds -- my wife has become the secretary of state, so no one really cares what I say -- unless I mess up.

It simply doesn't make any sense for us to have illegal aliens in our custody in our courts and then let them go back to living here illegally. That's wrong and we should stop it.

That all depends on what "is" is.

There are a lot of very brilliant people who believe that the nation-state is fast becoming a relic of the past.

Only astrophysicists new about the Internet 20 years ago. Today my cat has a website.

By lifting the weakest, poorest among us, we lift the rest of us as well.