[Maceman]

Thirty-nine years after JFK's assassination, the chance of another Kennedy achieving the presidency no longer seems inevitable remotely possible, except perhaps in delusional West Wing la-la land..

[mr.pink]

..the chance of another Kennedy achieving the presidency no longer seems inevitable remotely possible,

Agreed.

IMHO, the death of John Jr. was the ringing of the Kennedy family's political tree. It'll take a few more years while it whithers, and Ted is secure in his Senate seat forever, but they are over.