There have been several US Presidednts who died in office - three by assassination, and two that I recall by disease - and who therefore had no life at all after the Presidency.
The first Whig party candidate to win the presidency was William Henry Harrison. However, he had the shortest term in office as he died just 32 days into his presidency.
31 days William Henry Harrison in 1841
William Henry Harrison William Henry Harrison
William Henry Harrison
Peaceful, He died before his term of presidency.
In Central Asia, Tajikistan has the shortest life expectancy with about 66 years.
The radioisotope with the shortest half-life among the following options is Polonium-214.
William Henry Harrison, who fell ill with pneumonia and died after only a month in office.
Amongst other things, having the 2nd shortest Presidency in US history, being assassinated 200 days into it. William Henry Harrison's is the shortest being only 32 days long.
New Netherland
not sure
The radioactive parent isotope with the shortest half-life among the options provided.