That is, the driving force behind the town hall mobs is probably the same cultural and racial anxiety that’s behind the “birther” movement, which denies Mr. Obama’s citizenship. Senator Dick Durbin has suggested that the birthers and the health care protesters are one and the same; we don’t know how many of the protesters are birthers, but it wouldn’t be surprising if it’s a substantial fraction.

And cynical political operators are exploiting that anxiety to further the economic interests of their backers.

Does this sound familiar? It should: it’s a strategy that has played a central role in American politics ever since Richard Nixon realized that he could advance Republican fortunes by appealing to the racial fears of working-class whites.