Barack Obama: “For Arne, school reform isn't just a theory in a book – it's the cause of his life.”

Now the ball’s in your court, Iowa.

She knew she was going to mess me up, and she did it anyway."

There’s no doubt that we are going through a period right now of disruption, polarization.

They're meant to remind us of who we can be, to remind us of what's possible, so we can forge ahead.