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

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.

When Donald Trump in one speech said I love the poorly educated - which was a remarkable thing to say - he was saying those are my people.

The way Donald Trump talks about the problems of black Americans as a kind of separate group who are not part of his audience but he's kind of reaching over his audience or behind his audience to black Americans, saying what have you got to lose? As in you might as well join me because the Democrats haven't done anything for you. But joining me means joining this group that already supports me.

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.

Before the nineteen-seventies, most Republicans in Washington accepted the institutions of the welfare state, and most Democrats agreed with the logic of the Cold War. Despite the passions over various issues, government functioned pretty well. Legislators routinely crossed party lines when they voted, and when they drank; filibusters in the Senate were reserved for the biggest bills; think tanks produced independent research, not partisan talking points. The "D." or "R." after a politician's name did not tell you what he thought about everything, or everything you thought about him.

The literature of the Spanish Civil War is also important to me. Above all George Orwell's "Homage to Catalonia" as well as the writing of John Dos Passos and Ernest Hemingway. They worked on a film together in Spain during that war, which ended their friendship.