Where the stakes are the highest, in the war on terror, we cannot possibly succeed without extraordinary international cooperation. Effective international police actions require the highest degree of intelligence sharing, planning and collaborative enforcement.

If we aren't willing to pay a price for our values, then we should ask ourselves whether we truly believe in them at all.

The issue of climate change is one that we ignore at our own peril

If John McCain wants to have a debate about who has the temperament, and judgment, to serve as the next Commander-in-Chief, that's a debate I'm ready to have.

When you've got a economy in which 40 percent of economic growth is happening in the financial sector, that turns out that was all an illusion, that it wasn't growth based on real products and services, but just a bunch of paper shuffling and a house of cards, then what's gonna emerge, at some point, is a sense of resentment, a sense that the system's rigged, and it's not working for ordinary people. And it's not fulfilling the basic American dream.

What the Paris agreement now does is say to China and India and other countries that are potentially polluting, come on board. Let's work together so you guys do the same thing.

I want my children - I want Malia and Sasha - to understand that they've got responsibilities beyond just what they themselves have done. That they have a responsibility to the larger community and the larger nation, that they should be sensitive to and extra thoughtful about the plight of people who have been oppressed in the past, are oppressed currently.