From NYReview of Books by Gary Wills — his advocacy for political realism and not political idealism:
Roberto Unger, descended from a famous Brazilian family, is a respected philosopher, a famous political activist, and a professor at the Harvard Law School (tenured there, thirty-six years ago, at the unusually young age of twenty-nine). He has many just grounds for being famous. But he is best known now, in recent news items, for having taught Barack Obama two courses at Harvard. The professor has released a special video saying that he is too principled to have any further dealings with his former student. His message is that “Obama must be defeated” for failing to advance the progressive agenda.
I freely admit that Unger’s principles are better than Obama’s, that next to him Obama’s credentials as a progressive are muddied and blunted. If I had to choose between them as men of probity, I would prefer Unger as quick as the eye can blink. But in politics we never choose men of much probity. One of the recurring comedies of American politics is the rapture with which people elect a shining prince, and then collapse into self-pitying cries of betrayal when the shine comes off once the candidate is in office. A refrain of dismay runs the fairy tale in reverse: “We elected a prince and he turned into a frog.”Obama was never a prince. None of them are. The mistake behind all this is a misguided high-mindedness that boasts, “I vote for the man, not the party.” This momentarily lifts the hot-air balloon of self-esteem by divorcing the speaker from political taintedness and compromise. But the man being voted for, no matter what he says, dances with the party that brought him, dependent on its support, resources, and clientele. That is why one should always vote on the party, instead of the candidate. The party has some continuity of commitment, no matter how compromised. What you are really voting for is the party’s constituency. That will determine priorities when it comes to appointments, legislative pressure, and things like nominating Supreme Court justices….
Those who think there is no difference between the parties should look at the state that no longer elects any Democrats, the Texas described so well by Gail Collins, with its schools attacking evolution, its religious leaders denying there was ever any separation of church and state, and its cowboy code of justice. If people like Professor Unger, people too highly principled for us folks who muck around in the real world, get their way, they will not give us a prince turned into a frog, but America turned into Texas.