We live in a complex world and at a challenging time.

When you're out of work and you can't buy a home or you've lost your home and you're worried about paying your bills, then you become more worried about what other folks are doing. And sometimes that organizes itself around kind of a tribal attitude, and issues of race become more prominent.

Let it be said to our children's children that when we were tested we refused to let this journey end, that we didn't turn our back nor did we falter; and with eyes fixed on the horizon and God's grace upon us, we carried forth that great gift of freedom and delivered it safely to future generations.

I'll change the posture of our federal government from being one of the most anti-science administrations in American history to one that embraces science and technology.

It's important to know that the vast majority of people who were excited in 2008 are still really enthusiastic. We've got more volunteers now than ever, and they're engaged, they're motivated, they're not paying attention to the ups and downs of polls or Washington.

I will support Iraqis and Syrians fighting to reclaim their communities.

If you go out and make some things happen, you will fill the world with hope.