What is also true is that partly because my docket was really full here, so I couldn't be both chief organizer of the Democratic Party and function as Commander-in-Chief and President of the United States. We did not begin what I think needs to happen over the long haul, and that is rebuild the Democratic Party at the ground level.

Sometimes it may seem as if progress is stalled but what history of post-war Germany shows is that strength and determination and focus and adherence to the values that we care about will result in a better future for our children and our grandchildren.

There is a wonderful book called "Gandhi's Truth," by Erik Erikson, the psychologist. It is a great book. And I remember reading that and thinking about this connection between what we think in our personal lives and how that manifests itself in our politics. Those are two books, just off the top, that I think are sort of representative of reading that I did at that time. I never get a chance to read anymore.

What makes us exceptional - what makes us American - is our allegiance to an idea articulated in a declaration made more than two centuries ago: “We hold these truths to be self-evident, that all men are created equal; that they are endowed by their Creator with certain unalienable rights; that among these are life, liberty, and the pursuit of happiness.”

American politics is always somewhat fluid. In this age of social media, it means that voters can swing back and forth.

Throughout American history, there have been moments that call on us to meet the challenges of an uncertain world, and pay whatever price is required to secure our freedom.

On issues like Ukraine, on issues like Syria, we've had very significant differences [with Russia].