(Hat tip: Andrew Sullivan.) The Forward (Jewish newspaper published in New York, originally in Yiddish as Der Forverts) has an article about the inroads the Republican party is making among twenty- and thirtysomething American Jews.
This is particularly noteworthy as American Jews have a deserved reputation for being "yellow dog Democrats" --- a colorful Americanism for somebody who would vote for a cowardly dog rather than cross party lines. (I have previously commented on some of the historical reasons why.) Indeed, rich Jewish donors used to provide much of the financing for the Democratic party, which makes up for the tendency of big business to favor the GOP [=Republicans, for non-US readers].
Contrary to popular belief outside the US, American Jewish voting patterns tend to be more driven by domestic issues (religion-state relationship, the public school system, welfare,...) than by foreign policy. And the canard often heard outside the US that American presidents treat Israel with kid gloves because of the Jewish community overlooks the fact that Jews only represent two percent of the US electorate --- so a pro-Israel policy would backfire electorally if it were grossly out of step with the view of the population at large. (In fact, an older Sunday Times article by Andrew Sullivan argues that much of grass-roots Americans support of Israel rests on a perceived commonality of values, further strengthened by a perceived commonality of fate post 9/11.)
What I see happening now is a confluence of two things. Firstly, the GOP is aggressively courting voters outside its traditional core constituencies (not just among Jews, but particularly among blacks and Latinos) -- both in an attempt to prove that they are a party of everyone, and because there has been an ideological "paradigm shift" among mainstream conservatives towards a movement defined by commonality of values rather than commonality of background.
Secondly, the increasing McGovernization of the Democratic party has led to a situation where an increasing percentage of American Jews finds itself out of step with the Democratic party on domestic as well as foreign policy issues.
While I do not expect the American Jewish community to turn GOP overnight, I do think the days of Democratic tickets polling 80% and up of the Jewish vote will be a thing of the past.