I think, all in all, the Obama administration and what President Obama has focused on has lived up to our need to protect American interests, to live our values and assert our values, and to stand up for future generations.

Climate change is real. The science is compelling. And the longer we wait, the harder the problem will be to solve.

America is the most powerful economy in the world. We're an $18-trillion-dollar economy.

I will never cede the authority of our country or our security to any other nation. I'll never give a veto over American security to any other entity - not a nation, not a country, not an institution.

I voted to threaten the use of force to make Saddam Hussein comply with the resolutions of the United Nations.

We need a new approach to national security - a bold, progressive internationalism that stands in stark contrast to the too often belligerent and myopic unilateralism of the Bush Administration.

This revolution began with young people in Syria demonstrating because they wanted a future. They wanted opportunity, education, and so forth. They went out and they did it. Thugs came out and beat them up. The parents got angry that the thugs beat the kids up, and they went out and demonstrated, and they were met with bullets. They were killed. That's how this began.