... the two parties have offsetting political advantages. Democrats tend to win on party identification. Republicans tend to win on ideology. Democrats don't have to appeal to as many independents as Republicans do. Republicans don't have to appeal to as many moderates as Democrats do.

But the Democrats have a problem here. The party's leadership currently tilts heavily to the liberal side. Barack Obama is from the university community of Hyde Park in Chicago. Speaker Nancy Pelosi is from San Francisco, and important House committee chairmen are from similar "gentry urban" locales -- Henry Waxman from the West Side of Los Angeles, Charles Rangel from a district that includes not only Harlem but much of the Upper West Side of Manhattan, Barney Frank from Newton, Mass., next door to Boston.

Of the 21 top leadership members and chairmen, five come from districts carried by John McCain, but the average vote in the other 16 districts was 71 percent to 27 percent for Obama.

All these Democratic leaders understand that their home turf tilts far left of the rest of the nation. But a politician's political base is ultimately his or her reality principle. Moreover, most of these leaders -- though Obama obfuscated this in his campaign -- have strong, long-held convictions that are well on the left of the American political spectrum.

These are the people -- the House leaders more than Obama, surprisingly -- who have shaped the Democrats' stimulus package, cap-and-trade legislation and health-care bills. The rules of the House allow a skillful leader like Pelosi to jam legislation through on the floor, although she's had more trouble than expected on health care. But their policies have been meeting resistance from the three-quarters of Americans who don't describe themselves as liberals.
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The exit poll showed that though the Republican label had lost support since 2004, conservatives did not lose their edge over liberals. The health-care debate has shown that the economic distress caused by the financial crisis and recession has not, at least so far, moved significant numbers of Americans to change their views on the proper balance between markets and government.

"I don't want the folks who created the mess to do a lot of talking," Barack Obama said on a campaign stop in Virginia on Aug. 6. "I want them just to get out of the way so we can clean up the mess."

When a politician tries to stop debate, it's a sign he's losing the argument. Obama seems to have let the House Democrats overplay their hand. He ignored the fact that in our system neither party ever has all the advantages.