Global warming threatens our health, our economy, our natural resources, and our children's future. It is clear we must act.

The Occupy movement needs an organizing principle, and - just as the Tea Party did - it needs some actual measures of success. Choose one candidate whose agenda is squarely within that of the movement and make his or her electoral success a focal point.

Power must be used, but it must be tempered by soul-searching and the recognition of our human capacity for error. That is the maxim that should inform our approach to every challenge, from reforming state government to engaging in foreign affairs.

Shareholders have the right and obligation to set the parameters of corporate behavior within which management pursues profit.

Companies that pollute should be taxed so that a product's cost to society is reflected in the price of that product.

Health care reform, the marquee legislative accomplishment of the Obama administration's first term, was passed before we entered the world of divided government.

I do not believe that politics in the long run is about individuals. It is about ideas.