One of the challenges over the last decade is America has done experiments in nation building in places like Iraq and Afghanistan and we've neglected, for example, developing our own economy, our own energy sectors, our own education system. And it's very hard for us to project leadership around the world when we're not doing what we need to do.

For we have always understood that when times change, so must we, that fidelity to our founding principles requires new responses to new challenges, that preserving our individual freedoms ultimately requires collective action.

I don't think I underestimated [Vladimir Putin], but I think that I underestimated the degree to which, in this new information age, it is possible for misinformation for cyber hacking and so forth to have an impact on our open societies, our open systems, to insinuate themselves into our democratic practices in ways that I think are accelerating.

With respect to Syria, we are going to continue to work as we have over the last five, six years to push towards a political transition and settlement.

Money is the original sin in politics and I am not sinless.

I don't think the Democrats should think in narrow tactical terms about mid-term elections.

The spirit's there and that's not just my imagination. I think if you look at surveys and attitudes among young people, you see it.