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.

We do have to take the long-term view. And long term, the question to ask ourselves is whether America should attack others pre-emptively, whether she should embroil herself in wars far away from our soil, and try to bring democracy by force to the rest of the world.

I think there has been an exaggeration [of the terrorist threat].

I can tell you, Massachusetts, fastest growing sector of our economy is clean energy and energy efficiency companies. And they're growing faster than any other sector.

The fact is that you literally, by definition, cannot have a Jewish state and a democratic state and have a whole bunch of Palestinians in it who are living under military rule while the rest of the country is living under civil rule, and they have different rights and different - it's just not a democracy.

You don't value families if you force them to take up a collection to buy body armor for a son or daughter in the service.

What we have to do is go on the offensive. [The science on climate change] has been maligned and misinterpreted, and we need to fight back... [P]eople [need to] stop being moved by these talk show [hosts] and start looking for the facts themselves.