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.

I don't think of Hillary Clinton as a bad choice. She's an uninspiring choice. She is a deeply imperfect choice, largely for reasons of her own tendency to get into a defensive crouch and create greater problems for herself and the rest of us by refusing to have a transparent reckoning.

Hillary Clinton's such a classic Democratic political figure and believes so much in institutions and in gradualism in the old way of reaching compromises with the opposition in the back rooms. That's what she did in Congress. It's what I imagine she'll try to do in the White House.

Hillary Clinton said we need to bring back vocational education in high school. We need to support community colleges. We need to make sure that people who are not going to finish college have a job waiting for them and the skills to do the job. These are all - have become fairly standard Democratic policy positions.

If Hillary Clinton becomes president, how is she going to be able to get the country behind her when she seems like a political figure from another era?

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.

What goes on in a person's head, what impels them to a political choice, it's a pretty complicated question.