Not many of the Dems have made an issue of their faith, except perhaps Lieberman, and to a much lesser degree Clark, but they are nearly all religiously devout, pious, churchgoing people. Dems may be much more competitive for the votes of those considered to be firmly in Bush's "base" than expected. I myself have met people who though very Republican and devout within a "fundamentalist" tradition or sect, are seriously considering crossing the aisle and voting Dem this time. Of course, anecdotal evidence isn't worth much, but it doesn't take that many switching sides in so evenly divided an electorate as ours to make substantial in-roads on the other party's support.