That's about the best reason I can think of to explain why John McCain's stage IIA (or is it IIIB?) melanoma isn't the subject of every political chatterbox show on cable news. It certainly isn't because McCain has ever come clean and settled the many unanswered questions on the subject. Or because the medical community has weighed in and found the chances of recurrence to be negligible.

Far from it. The fact is that John McCain's...