If we're going to prevent people from being susceptible to the false promises of extremism, then the international community has to offer something better and the United States intends to do its part.

As long as countries like China keep going all in on clean energy, so must we.

I cannot swallow whole the view of Lincoln as the Great Emancipator.

It [the Constitution] didn't break free from the essential constraints that were placed by the founding fathers in the Constitution, at least as it's been interpreted, and the Warren court interpreted it in the same way that generally the Constitution is a charter of negative liberties. It says what the states can't do to you, it says what the federal government can't do to you, but it doesn't say what the federal government or the state government must do on your behalf. And that hasn't shifted.

Over the last 15 months, we've traveled to every corner of the United States. I've now been in 57 states? I think one left to go.

If you're looking for the safe choice, you shouldn't be supporting a black guy named Barack Obama to be the next leader of the free world.

You and I, as citizens, have the obligation to shape the debates of our time, not only with the votes we cast, but the voices we lift in defense of our most ancient values and enduring ideas.