The British election returned a resounding mandate to the Conservative Party and decimated the antisemitism-wracked Labour Party. Labour leader Jeremy Corbyn was exposed as unlikeable and incompetent, and as the facilitator of a massive upswing in antisemitism within the party—all of which was rejected by voters. The lesson for the US Democratic Party is that punitive leftism and overt antisemitism are unacceptable, though divisions within the American Jewish community mute that message. For Israel, the lesson is to try to remain as bipartisan as possible, though that won’t be easy.