The United States will do what we must to prevent Iran from obtaining a nuclear weapon.

Today we're seeing that climate change is about more than a few unseasonably mild winters or hot summers. It's about the chain of natural catastrophes and devastating weather patterns that global warming is beginning to set off around the world.. the frequency and intensity of which are breaking records thousands of years old.

Arne Duncan is done more to bring our educational system, sometimes kicking and screaming, into the 21st century than anyone else.

You can question somebody's views and their judgment without questioning their motives or patriotism.

Back in the '50s and '60s, most politicians were concerned about not talking about faith, partly because there were consequences you had to deal with - (for instance) Catholicism had been made an issue.

Your ability to let go is part of the duty that you have.

Going back to the discussion we were having about immigration reform, some of the most challenging discussions I've had are with activists who essentially would argue that any immigrant from Central America, let's say, who gets here to this country should be allowed to stay because their country is dangerous, their country is poor, and the opportunities for that mom and that kid are much greater here, and why would you send them back?