(CNN) -- Which Democrat is winning the battle for religious voters? God only knows.

For years, the evangelical community has largely supported Republican presidential candidates.

Conservative Christian activists, drawn by the party's stands on abortion, gay marriage and other social issues, have been among the GOP's most reliable foot soldiers. Watch how faith is playing into the election »

During the primary season, former Baptist minister Mike Huckabee appealed directly to evangelicals as one of their own -- but in opinion polls conducted early in the primary season, those voters preferred either Democrat to the former Arkansas governor.

Winning over religious voters, especially evangelicals, is still an uphill climb for any Democrat -- but for the first time in recent memory, the party believes its next nominee may have a prayer.