The good news is that Jewish voters are abandoning Obama in higher percentages than any other demographic group:
…[O]ne of the surveys showing [Obama] with a lead in a tight race over Mitt Romney also provides a breakdown of the data that confirms predictions that he is losing up to a quarter of the Jewish votes he got in 2008. The Investors Business Daily/Christian Science Monitor/TIPP Poll gives a breakdown of religion along with other demographic groups and shows Obama leading among Jews by a margin of 59 to 35 percent with six percent undecided. While that is still a majority it is a dramatic decline from the 78 percent of the Jewish vote he got four years ago.
Obama has a 46-44 percent lead over Romney in the TIPP poll. That means Obama is suffering from a decline in support throughout the electorate from his 2008 victory when he won 53 percent of the vote. But the president’s loss of approximately 25 percent of Jewish voters this year is not matched by a similar decline in any other demographic group.
The bad news is that a majority of Jewish voters still support him.
Jewish voters are a very tiny portion of the electorate. But they tend to be a vocal one, and also a disproportionate number of Obama donors come from their ranks. And of course they matter quite a bit in important toss-up state Florida.
ADDENDUM: Here’s an example of why they might be leaving [hat tip: commenter “Curtis”):