There are folks who will equivocate. They'll say, 'You know, I'm not a scientist.' Well, I'm not either. But the best scientists in the world know that climate change is happening.

There is a word in South Africa - Ubuntu - that describes his greatest gift: his recognition that we are all bound together in ways that can be invisible to the eye; that there is a oneness to humanity; that we achieve ourselves by sharing ourselves with others, and caring for those around us.

Let us remember that we can do these things not just because of wealth or power, but because of who we are: one nation under God, indivisible, with liberty and justice for all.

I haven't been sorting through each and every aspect of this. Here's what I know: Hillary Clinton was an outstanding Secretary of State. She would never intentionally put America in any kind of jeopardy.' Mr. Wallace pressed further on the jeopardy angle, and Mr. Obama responded again: 'I continue to believe that she has not jeopardized America's national security. Now what I've also said is that - and she has acknowledged - that there's a carelessness, in terms of managing emails...'"

Our unalienable right to life and liberty and the pursuit of happiness, those rights were stripped from college kids in Blackburg and Santa Barbara, and from high schoolers at Columbine. And, and from first graders in Newtown, first graders.

The only time I get frustrated with activist criticism is if I have recognized them, and invited them to work with me to figure out how we solve this problem that they're concerned about, and either they don't engage out of the sense of purity - "I'm not going to shake his hand" - or you're not sufficiently prepared so you don't even know what to ask for, or you're not being strategic as an activist and trying to figure out how the process has to work in order for you to get what you want.

As I travel around the world, it's fascinating; European leaders, Asian leaders, they all say to me, America is actually poised to be the world leader for another century - if we can fix some of this political dysfunction. ... We've got a lot of national security challenges, but if we get our economy together, and if we can get our political system to work well, I am really confident about our future.