The Barna Group, a Christian research firm, shows Barack Obama leading John McCain by a substantial margin among Christian voters:
A new nationwide survey of people's candidate preference conducted by The Barna Group some movement over the past two months, with Sen. Obama maintaining a substantial 43% to 34% lead among those who are likely to vote in November, with 5% selecting minor party candidates. ...
For the most part, the various faith communities of the U.S. currently support Sen. Obama for the presidency. Among the 19 faith segments that The Barna Group tracks, evangelicals were the only segment to throw its support to Sen. McCain. Among the larger faith niches to support Sen. Obama are non-evangelical born again Christians (43% to 31%); notional Christians (44% to 28%); people aligned with faiths other than Christianity (56% to 24%); atheists and agnostics (55% to 17%); Catholics (39% vs. 29%); and Protestants (43% to 34%).
If the Barna Group's findings hold true, "this would mark the first time in more than two decades that the born again vote has swung toward the Democratic candidate."