The Republican Jewish Coalition has always been the Republican Jewish Coalition. I think the traditionally high percentages of Jewish voters who reliably turn out to vote Democratic will continue to do so.
June 8 Gallup Poll Review. As is typical for this group, the support for a Republican candidate is likely to hinge on economic status as much or more as on policy differences, which really, when it comes to Israel, will not be profound.
At this time Jews favor Obama over Romney on a roughly 2-1 basis (actually slightly higher) based on the Gallup Poll of June. That is down perhaps 7% from the highs people like Roosevelt and Stevenson enjoyed fifty years ago. It may slip another point or two or go the other way because of traditionally strong progressive views Jews have on social issues. When it comes to pulling the lever on election day, Jews will continue to support the Democrats. There's nothing in the laws of physics that suggests that rich Republican Jews can't vote for Romney, just as Jenna Jameson will. But really, how many porn stars or Republican Jews do you actually meet day to day?
I would not count the Jewish vote for Romney, and would be willing to place modest bets on the demographics of the outcome in November. What odds am I offered? In the end, Jews will vote in larger numbers for Obama than Romney, and I think you can count on that. Moreover, their actual policies (relative to Israel) will never be that different, and in all other regards, the Jewish demographic tends to broadly favor progressive social views. A few percentage points of slip is all I think Romney can count on. A lot of noise based on a lot of money being tossed around by a very few people.