Reasons abound why you should do all you can to defeat John McCain--but for you, it should be personal. Maybe you've forgotten in the heat of the Democratic contest. But remember McCain's cruel joke about your daughter, when Chelsea was 18 and vulnerable. This alone should give you every reason to stand against McCain--and nothing to boost his chances.

McCain made the joke at a 1998 Republican Senate fundraiser. "Why is Chelsea Clinton so ugly?" he asked. "Because her...