Ralph Reed makes the case that those who say that the powerful evangelical social conservative wing of the Republican Party is a thing of the past are flat wrong.
I did my own check. Of white GSS respondents polled in 2008 and 2010, 46.4% who describe themselves as slightly conservative, conservative, or extremely conservative also say they are born-again (sample size = 1,097). That sounds pretty powerful to me.
By the way, one-third of self-described moderates are born-again. This ain't no fringe group, and I see no signs that it is a passing fad.