Vote by church attendance. This is always an interesting category to look at for me.
Never (17%): Surprisingly, a pretty big swing here. In 2008, Obama won this category 67-30. In 2012, Romney made up ground, Obama lost a ton of ground. Obama won the category 62-34. There was a 1% increase in the amount of people saying other/no answer. Interesting.
A few times a year (27%): Romney made up ground here. Obama won the category 59-39 in 2008 and in 2012 he won the category 56-42. I'm assuming that we'll see it be more stable as church attendance goes up. But we'll see.
Monthly (13%): Starting to see it become more stable. Only changing 2%. But a surprising switch. Obama won 2008 the category in 2008 53-46 but in 2012 Obama widened the gap and got it up to 55-44. This is interesting, to me.
Weekly (28%): This is getting to the Republican stronghold. In 2008, McCain won 55-43. In 2012, Romney widened the gap to 58-41.
More than weekly (14%): I was dead wrong about it being stable. In 2008, McCain won the category 55-43 but Romney dominated this category and stretched it to 63-36. This is probably why I thought it was more religiously charged then it looked like, initially.
CNN breaks it down another way.
Never (17%): See above.
Occasionally (40%): Obama won this category in 2008 57-42. In 2012, this changed slightly to Obama winning 55-43. So not a big swing. But something interesting.
Weekly (42%): Pretty big change as we can guess from the above data. McCain won this category 55-43 in 2008 and Romney stretched this lead to 59-39 in 2012. So, fairly big change.