I think it's too late. I think that there's been too much. This all started with the red line, walking away from it. The inability to arm the legitimate [Bashar] Assad opposition.

I've heard a lot of nasty rhetoric about the president. We're going to kick your rear end out of the White House and stuff. That's just not the way I behave.

A leader has a sound program, has a good policy, and then brings people together to solve problems.

I can't work any harder. I can't do any more. I am literally just blown away and humbled by the volunteers and how hard they're working. I think they've got a sense that they're going to be part of something bigger than themselves.

I don't accept that. I really don't care - I'm going to be like one of these deniers - I don't care what the polls say.

[Barack Obama] needs to really engage both Republicans and Democrats.

I don't want to get into an argument with somebody about how they ought to vote.