We all know- or at least we are told continually- that we are a divided people. And we know there's a degree of truth in it. We have too often allowed our differences to prevail among us. We have too often allowed ambitious men to play off those differences for political gain. We have too often retreated behind our differences when no one really tried to lead us beyond them. But all our differences hardly measure up to the values we all hold in common... I am running for the Senate because... I want to make the system work again, and I am convinced that is what all Americans really want.

Pages xvi-xvii - Promises to Keep (2008)