Under this [Bush] Administration, America's middle class has been abandoned -- its dreams denied, its Main Street interests ignored and its mainstream values scorned by a White House that puts privilege first.

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

If Russia is there [in Syria] alone fighting them [ISIL], guess what? Russia becomes the target and Russia starts seeing - who knows - MANPADs will find their way in there, airplanes will fall out of the sky. They will become vilified. They'll become the new magnet, together with Assad, for the jihadis.

If we can't have a serious conversation without politicizing it on cable TV and making it a scoring point for one day, we're in trouble.

Regime change has been an American policy under the Clinton administration, and it is the current policy. I support the policy. But regime change in and of itself is not sufficient justification for going to war--particularly unilaterally--unless regime change is the only way to disarm Iraq of the weapons of mass destruction pursuant to the United Nations resolution.

President Obama has made it his mission that we welcome our troops home with care, and concern, and the respect they deserve. That is how an exceptional nation says "thank you" to its most exceptional men and women.

The threat of Saddam Hussein with weapons of mass destruction is real, but as I said, it is not new. It has been with us since the end of that war, and particularly in the last 4 years we know after Operation Desert Fox failed to force him to reaccept them, that he has continued to build those weapons. He has had a free hand for 4 years to reconstitute these weapons, allowing the world, during the interval, to lose the focus we had on weapons of mass destruction and the issue of proliferation.