For the first time in at least two presidential election cycles, the Republican Party can't assume it has a complete lock on the evangelical vote.

Barack Obama with Rev. Rick Warren

From The Wall Street Journal:

For the first time in at least two presidential election cycles, the Republican Party can't assume it has a complete lock on the evangelical vote, which makes up about a quarter of the electorate. President George W. Bush received 78% of the bloc in his 2004 re-election campaign. Polls show that about a third of these white Protestants are either undecided or planning to vote Democratic or independent this November.