I would say of all the things that have happened during the course of my presidency the knowledge that you have hundreds of thousands of people who have been killed, millions who have been displaced, [makes me] ask myself what might I have done differently along the course of the last five, six years.

I think that when it comes to Social Security, all of us want to make sure that our senior citizens can retire with dignity and respect. And everybody has to be open-minded in thinking how do we firm up a system that, in fact, is going to be in difficulty in the coming years.

I'd like to think that "President Obama believed deeply in this democracy and the American people."

The United States believes that every nation should respect international law, including in the South China Sea.

You don't like dealing with somebody who denies horrible things happening to your people or threatens future horrible things to your people.

Climate change poses a direct threat to the infrastructure of America that we need to stay competitive in this 21st-century economy.

We are growing the economy in smart ways and rebuilding our infrastructure and investing in science and development and that we stay true to those values that helped to get us here.