If you give up on the idea that your voice can make a difference, then other voices will fill the void: lobbyists and special interests; the people with the $10 million checks who are trying to buy this election and those who are making it harder for you to vote; Washington politicians who want to decide who you can marry, or control health care choices that women should make for themselves.

Yesterday, John McCain actually said that if he's president that he'll take on, and I quote, 'the old boys network in Washington.' Now I'm not making this up. This is somebody who's been in Congress for twenty-six years, who put seven of the most powerful Washington lobbyists in charge of his campaign. And now he tells us that he's the one who's gonna' to take on the old boys network. The old boys network? In the McCain campaign that's called a staff meeting. Come, on!

A brighter future is ours to write. Let’s begin this new chapter — together — and let’s start the work right now.

ISIS is not an organization that can destroy the United States. This is not a huge industrial power that can pose great risks to us, institutionally or in a systematic way. But they can hurt us. And they can hurt our people and our families.

Scientists and engineers ought to stand side by side with athletes and entertainers as role models.

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?

We have come from a time of the large-scale, planned, Al Qaeda-style attacks, to the encouragement of lone wolves: Fort Hood, Chattanooga. To the encouragement of people to act on their own.