"This study illustrates, in a rough way, why the Northeast, the upper Midwest and the West Coast are Democratic strongholds, while the South is dominated by Republicans. Basically, the split is between "non coastal" Evangelicals and Mormons versus the rest of the nation, which is now increasingly diverse and secular.
This split has enormous implications for the nation. Now that discussion of faith and values in the political sphere is now requires by anyone seeking national political office, we can see the political and public policy implications of having one political party - Republicans - beholden to religious dogma and the other political party - Democrats - committed to reason and secularism. So many people have been turned off by the use and abuse of religion in the public sphere that it's a major reason why the "Nones" are growing in number. "
http://www.american-reporter.com/4,256/592.html