Barack Obama: "I've always described the presidency as a relay race; you take the baton from someone, you run your leg as hard and as well as you can and then you hand it off to someone else, knowing that your work will be incomplete. The portraits hanging in the White House chronicle the runners in that race, each of us tasked with trying to bring the country we love closer to its highest aspirations. And when future generations walk these halls and look up at these portraits I hope they get a