Overall, we found that 28 percent of Americans could be classified as religious conservatives, 38 percent as religious moderates and 19 percent as religious progressives. An additional 15 percent were nonreligious.
Among supporters of the two parties, Republicans were far more cohesive. The analysis found that 56 percent of Republicans were religious conservatives and 33 percent were religious moderates. Only 5 percent were religious progressives and just 6 percent were nonreligious.
via E.J. Dionne Jr.: Religion challenges left and right – The Washington Post.