I don't think the Senator Ted Kennedy and Caroline Kennedy endorsements are more about a person who they believe has magic rather than a repudiation.
I would also amend your formula:
Caroline Kennedy + Ted Kennedy = JFK
Shouldn't the math look like this?
Caroline + Ted > Kathleen + Bobby Jr. + Kerry
I doubt most people east of New York State have heard of the accomplishments of Kathleen, Bobby Jr. or Kerry.