The longer the Democratic race goes on, the more obvious it appears that each is deeply, perhaps ineradicably flawed.

Until about a month ago Barack Obama had done a brilliant job of presenting himself as a transcendent figure, the mixed-race candidate with bipartisan appeal who promised to heal the historic and modern rifts in American life.

But the mask has slipped. Under pressure in a Democratic primary, Mr Obama has sounded just like any other tax-raising, government-loving Democratic politician. Worse, he has revealed himself to be a member of that special subset of the party's liberal elite - a well-educated man with a serious superiority complex.

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Mr Obama's missteps with the working class of Pennsylvania have thus transformed Mrs Clinton from the bluestocking Wellesley graduate into the good old girl, hanging out there with the straw-chewing rednecks, embracing their values, their worldview and even their lifestyle.

Obliterate Iran! Here comes Osama bin Laden! I love duck hunting! I can do shots and beer at the same time! It's hard to know what's worse - expressing condescending views about the working class or pretending to be one of them. The Democratic campaign is simply disappearing in the enveloping vapidity of the candidates' making.