The death of a sitting president can have a seismic effect on the government of the country in question and have huge ramifications for the wider nation and the world. When President John F. Kennedy was assassinated in 1963 — the last time a president died in office — it led chaos. The shock of the death deeply affected the United States, and it sowed a new era of distrust in the media and paranoia about potential security threats inside and outside of government. The unrest compelled Congress to pass the 25th Amendment, clarifying the legal procedure for presidential succession.
Kennedy's wife, Jackie, received the nation's sympathy after her husband's shocking death. She remained a much-loved figure throughout her life, and her profile remained high within American society thanks to