I think it is manmade. I think it's clearly manmade. If you don't understand what the cause is, it's virtually impossible to come up with a solution. We know what the cause is. The cause is manmade. That's the cause. That's why the polar icecap is melting.

Justice Sandra Day O'Connor brought critical qualities to the high court that not everybody thinks are qualities - I happen to think they are - her pragmatism and her state craft.

I was in sit-ins to desegregate restaurants and movie houses in the '60s.

But I was amazed at how organized the Palestinian election authority was, how competent they were in setting up their polling places and the poll workers they had.

The reason I talk so much about the middle class is it's the glue that holds America together. It really is. And we don't speak enough to their legitimate concerns.

There's one advantage in having been around as long as I have. Everybody in the Senate knows me, and - I'm going to say something presumptuous, to repeat myself - I think most respect me.

I was part of the journey of a remarkable man [Barack Obama] who did remarkable things.