At Party A's national convention, a prime speaking slot went to an infamous racial inciter, one with an ugly history of Jew-baiting. At Party B's convention, a leading speaker recalled with empathy the many pre-9/11 victims of terrorism, such as Leon Klinghoffer, whom the killers ''marked ... for murder solely because he was Jewish.''

Party A's presidential nominee said nothing about Israel in his convention acceptance speech. Party B's nominee, on the other hand, made a point of referring to ''our good friend Israel'' - and his campaign later distributed that portion of his remarks to its national e-mail list.

Increasingly, Party A is the political home of those who demonize Jews, such as the South Carolina senator who claimed that the war in Iraq was launched to ''take the Jewish vote.'' Conversely, Party B has driven out the anti-Semites in its midst, and is now where the most ardent philo-Semites in American politics are concentrated.

So which party will American Jews vote for in November?

If you know your political tides, the answer won't surprise you: Jews will almost certainly vote overwhelmingly for Party A - the Democratic Party - just as they have for more than half a century...