Secular Right offers an interesting graphic which shows that the Democratic party is becoming increasingly the party of secularists whereas the Republican party is becoming increasingly the party of the religious. As secularism increases in the U.S. (from 9% in 1990 to 15% today) those without any religious affiliation are finding a home in the Democratic party:
People like Glenn Beck often insist that there's no substantive difference between the two major parties but, as this graphic illustrates, such claims are misleading.
It might be interesting to speculate on why secular folk are drawn to the Democrats and religious folk are attracted to the GOP. One reason, surely, is that the Democrat party is seen, with some justification, as the party of abortion and libertinism and the party whose supporters pose the greatest threat to religious freedom in this country.
RLC
