Republican secretaries of state from Kissinger to Baker, Powell to Rice, President Bush, 71 United States Senators all supported President Obama's new START treaty, but not Mitt Romney.

I came into public life during the 1960s when a whole bunch of us believed in our ability to change the world. And we did a lot of things.

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.

We don't differ with the government on the demands [on Iran], but we totally reject how Bibi is handling it. Bibi sacrificed good relations with the U.S. to keep the status quo on the Palestinians. He poked the [Obama] Administration in the eye on settlements just to appease right-wingers

And if [Vladimir Putin] does fight ISIL alone, how does it work out for Russia to have sided with Assad, sided with Iran, sided with Hizballah, when they're trying to reach out to the rest of the Sunni world in the region? That's not a good equation for Russia.

I believe it is both unwise and even wrong to interfere in the affairs of other nations. Indeed, if we are honest, we will see that this is one of the reasons for 9-11.

I think that our own crisis of democracy is in its own way affecting our ability to leverage in the same way that we used to in the world.