I'm feeling pretty clever, because when word of the West Wing cast getting together to film a PSA leaked a while ago, my immediate response was "I bet it's for Mary McCormack's sister!" And yup! It's an incredible ad for remembering to vote in non-partisan races in general and for Bridget Mary McCormack in particular.
I somehow kept a straight face until "Is this apocalypse now?" and "Read the message boards."