One of the main reasons we ought to re-elect President Obama is that he is still committed to constructive cooperation... He appointed Republican secretaries of defense, the Army and transportation. He appointed a vice president who ran against him in 2008.

He was a martyr of peace but was the victim of hate. If people can't let go of the hatred of their enemies they risk sowing the seeds of hate among themselves.

We simply have to transition from an economy based almost exclusively on oil and coal and natural gas to one that's far more diversified, that uses solar energy, and wind energy, and the power of the tides, and bio-mass energy, and eventually, develops hydrogen.

The United States should.... avoid unilateral export controls and controls on technology widely available in world markets. Unilateral controls penalize U.S. exporters without advancing U.S. national security or foreign policy interests.

I figured if I could get really good people who were going to be able to have a big impact in the world over the next decade to come together once a year for ten years and actually sign a pledge to take action themselves, if we did that every year for ten years we could do a lot of good in the world. That's the difference between my meeting and any other. If you don't want to promise to do something, don't come to my meeting, stay home.

If we disagree and I think I'm right, I just go ahead and do what I think is right. And then she tells me, 'I told you so.'

The seven principles of Kwanzaa - unity, self-determinat ion, collective work and responsibility, cooperative economics, purpose, creativity and faith -- teach us that when we come together to strengthen our families and communities and honor the lesson of the past, we can face the future with joy and optimism.