Reflecting on his years in prison, Nelson Mandela wrote that there were dark moments that tested his faith in humanity, but he refused to give up.

Hillary Clinton has been in politics for the same reason I am - because we can improve other people's lives by doing this work.

Jimmy Carter will go down in American history as 'the president who lost Iran,'

I can say to the German people that the United States has been good for Germany. Has looked out for Germany. Has provided security for Germany. Has helped rebuilt Germany. And unify Germany.

If we are going to solve the challenges we face, you need a President who will pursue genuine solutions day in and day out. And that is my commitment to you. We need immigration reform that will secure our borders, and punish employers who exploit immigrant labor; reform that finally brings the 12 million people who are here illegally out of the shadows by requiring them to take steps to become legal citizens. We must assert our values and reconcile our principles as a nation of immigrants and a nation of laws. That is a priority I will pursue from my very first day.

I'm always suspicious of politics dividing people instead of bringing them together.

You know, the truth is that right after 9/11, I had a (flag) pin. Shortly after 9/11, particularly because as we're talking about the Iraq war, that became a substitute for, I think, true patriotism, which is speaking out on issues that are of importance to our national security, I decided I won't wear that pin on my chest.