The new Pew poll, which shows a massive 52%-36% advantage for Obama, reveals something very interesting in the patterns for white evangelicals: Obama has made few if any gains at all — but McCain has dropped. On October 12, 74% supported him. Now, 65% do. In other words, as election day approaches, the number of evangelicals who are undecided is going up.
One silver lining for McCain: undecideds tend to be more religious (possibly the flip side of the same point). That means that, in all likelihood, they will end up breaking more for McCain than Obama.