I don't regret at all saying that if I saw Bashar al-Assad using chemical weapons on his people that that would change my assessments in terms of what we were or were not willing to do in Syria.

And I believe the nation that invented the automobile cannot walk away from it.

I would not be running for President if I didn't believe with all my heart that this is what the vast majority of Americans want for this country. This union may never be perfect, but generation after generation has shown that it can always be perfected. And today, whenever I find myself feeling doubtful or cynical about this possibility, what gives me the most hope is the next generation - the young people whose attitudes and beliefs and openness to change have already made history in this election.

We are now at a point where because we in fact have been successful at stopping a number of plots, a threat has evolved. We do see these lone-wolf actors. We do see these encouragements for troubled individuals to pick up a gun and act out of this ideology.

My task over the last two years hasn't just been to stop the bleeding. My task has also been to try to figure out how do we address some of the structural problems in the economy that have prevented more Googles from being created.

Part of people's concern is just the sense that around the world the old order isn't holding and we're not quite yet to where we need to be in terms of a new order that's based on a different set of principles, that's based on a sense of common humanity, that's based on economies that work for all people.

I won Iowa not because the demographics dictated that I would win Iowa. It was because I spent 87 days going to every small town and fair and fish fry and BFW Hall, and there were some counties where I might have lost, but maybe I lost by 20 points instead of 50 points. There's some counties maybe I won, that people didn't expect, because people had a chance to see you and listen to you and get a sense of who you stood for and who you were fighting for.