Barack Obama: “we will not waiver in our commitment to see that justice is done for this terrible act.”

Every president here today, as different as we are, has tried our best to uphold the values that John McCain and Mitt Romney believed in no less than I did.

Now the ball’s in your court, Iowa.

In forming our union, the founders fell terribly short of the Declaration's promise, leaving slavery intact, allowing states to restrict the franchise to white men who owned property.

helped lead some of the most significant movements for change in human history