Back in February, I suggested that McCain would start with a base of 25-30% of the Jewish vote (or slightly more than Bush received in 2004) and, if Obama was the nominee, that it's feasible he could get 40% or more.

A recent Gallup survey (analyzed here by Shmuel Rosner of Ha'aretz) shows Obama getting 61% of the Jewish vote, compared to 32% for McCain. Given that some fraction of Jewish potential McCain voters are probably reluctant to admit that they don't intend to vote for a liberal Democratic African American candidate (all three are categories to which many Jews feel loyalty/obligation), the real numbers are likely a bit worse.

The survey is based on polling data for the entire month of April, which means that it only partially accounts for the recent publicity over Rev. Jeremy Wright, whose antics (especially his vigorous defense of Farrakhan) are hardly likely to attract Jews to Obama.

Clinton does substantially better among Jews than Obama, which is especially interesting given that the Jewish demographic overlaps to a large degree with Obama's base of supporters--well-educated, professional, urban; the rural blue collar vote that has recently favored Clinton doesn't have much of a Jewish component. Gallup's press release doesn't break down the Jewish vote by subpart, but I'm guessing that Obama is particularly weak among older Jews, and among the Orthodox. Translation: trouble for Obama in Florida, and to a lesser extent Ohio and Pennsylvania (in the latter state, Hillary crushed Obama 62-38% among Jewish voters).

Caveat: The Gallup data is based on a sample size of only 588 Jewish Democrats, and Gallup does not reveal its estimate of the margin of error.