Zero got 78 percent of the Jewish vote in 2008 and 69 percent in 2012.
http://www.jewishvirtuallibrary.org/jsource/US-Israel/jewvote.html
Yes, I looked at the same source.
I’m not certain that it can answer the crucial question - which “blue” states would have gone for Romney had Obama’s share of the Jewish votes been 10% less?