(Original-WRH)
John Kennedy Jr. was planning to announce his intention to run for the US Senate in the the July 26th, 1999 issue of Newsweek. But then he died in a suspicious plane crash, and his rival for that same Senate seat, Hillary Clinton, won. The July 26th, 1999 issue of Newsweek was pulled from circulation and the story of JFK Jr's plan to run for office buried.
If you are wondering why Ted Kennedy endorsed Obama over Hillary, this is probably a big part of it.