I think that bias is not a fixed thing. It's not as though some people are biased and others are not. It ebbs and flows. It can be manipulated. It changes according to a person's circumstances.

The biggest issue for me is whether large numbers of Americans can begin to think that government can actually help make the country a fairer place. And that's partly a matter of policies that achieve results in terms of reducing inequality and raising middle-class and working-class incomes, which have been flat for decades. But it's also symbolic and rhetorical, it's whether Hillary Clinton can - or whoever's president - can persuade Americans that it's happening and that they can begin to trust their elected officials a little bit more and their institutions of government a little bit more.

At the heart of the matter is a battle between wish and fear. Fear generally proves stronger than a wish, but it leaves a taste of disappointment on the tongue.

One book that I heard was circulating the Green Zone was "Bureaucracy Does Its Thing" by Robert Komer , who worked for President [Lindon] Johnson in Saigon. This book is about the inevitably of screwing up when a country takes on a war with so little understanding of the country they are fighting.

I don't know how we continue to do politics in a democracy if we simply can't listen to one another, if we simply close the door and say you are beyond redemption.

We focus on that really repulsive minority of racists. But then there's a continuum that goes all the way to, you know, what used to be called the white backlash or to, you know, the feelings of some white people that they're losing out and that the jobs and power and sort of the culture is drifting away from them and toward people who don't look like them, who don't - who they don't know very well. And that's not necessarily - I don't equate that with the hardcore ideological hatred of self-identified racists.

The Petraeus-Crocker testimony is the kind of short-lived event on which the Administration has relied to shore up support for the war: the 'Mission Accomplished' declaration, the deaths of Uday and Qusay Hussein, Saddam's capture, the transfer of sovereignty, the three rounds of voting, the Plan for Victory, the death of Abu Musab al-Zarqawi. Every new milestone, however illusory, allows the Administration to avoid thinking ahead, to the years when the mistakes of Iraq will continue to haunt the U.S.