Dan Gilgoff at US News speculates that the rise of the Nones will lead to a more polarized electorate:

As more Americans leave religion, the ones left in the pews are those most committed to their faith. In a nation where church attendance is one of the best predictors of voting behavior–the more often you attend, the more likely you are to vote Republican–this polarization of religious life will spill over into the political arena, setting off more culture-war battles.