David E. Campbell and Robert D. Putnam explore the secret origin of the Tea Party in today's NYT:

So what do Tea Partiers have in common? They are overwhelmingly white, but even compared to other white Republicans, they had a low regard for immigrants and blacks long before Barack Obama was president, and they still do.

More important, they were disproportionately social conservatives in 2006 — opposing abortion, for example — and still are today. Next to being a Republican, the strongest predictor of being a Tea Party supporter today was a desire, back in 2006, to see religion play a prominent role in politics. And Tea Partiers continue to hold these views: they seek “deeply religious” elected officials, approve of religious leaders’ engaging in politics and want religion brought into political debates. The Tea Party’s generals may say their overriding concern is a smaller government, but not their rank and file, who are more concerned about putting God in government.

This inclination among the Tea Party faithful to mix religion and politics explains their support for Representative Michele Bachmann of Minnesota and Gov. Rick Perry of Texas. Their appeal to Tea Partiers lies less in what they say about the budget or taxes, and more in their overt use of religious language and imagery, including Mrs. Bachmann’s lengthy prayers at campaign stops and Mr. Perry’s prayer rally in Houston.