Here are data taken from exit polls. They show the percentage vote by religion (with the vote for Obama on the left, that for McCain on the right).
45 54 Protestant
54 45 Catholic
78 21 Jewish
24 74 Evangelical Christians
You might like to think about how this picture measures up against an image energetically cultivated in some left-liberal quarters about the typical influence of Jews in American political life. (The data are to be found in a panel attached to this article in today's Guardian newspaper, but not in the online version.)