- William Henry Harrison, elected in 1840, died of illness while in office
- Abraham Lincoln, elected in 1860, died of assassination while in office
- James A. Garfield, elected in 1880, died of assassination while in office
- William McKinley, elected in 1900, died of assassination while in office
- Warren G. Harding, elected in 1920, died of illness while in office
- Franklin D. Roosevelt, elected in 1940, died of illness while in office
- John F. Kennedy, elected in 1960, died of assassination while in office
- Ronald Reagan, elected in 1980, nearly died of assassination but survived
- George W. Bush, elected in 2000, somehow unscathed
- Joe Biden, elected in 2020, is rumored to be dying……
How many coincidences before it's mathematically imposssible?
20 year cycles, Saturn and Jupiter conjunction dates. Latest one 2020.