Additional realistic cases of US Presidents who will serve less than one year in office

[WolfBear]

In real life, US Presidents William Henry Harrison and James Garfield served less than one year in office, but which additional realistic cases of this could there have been had history unfolded a bit differently? I can think of:

-Philander Knox winning the 1920 GOP presidential nomination as a compromise candidate, then winning the US Presidency later that year and dying in office in late 1921
-Robert Taft winning the 1952 GOP presidential nomination in place of Dwight Eisenhower, then winning the US Presidency later that year and dying in office of cancer in late 1953
-Ronald Reagan being successfully assassinated by John Hinckley in March 1981 like he almost was in real life

Anyway, which additional realistic examples of this could you think of?

 

[WolfBear]

@Skallagrim Since you're an expert on US history, do you have any ideas in regards to this?

 

[Skallagrim]

I think one President with a very good chance of dying within one year of taking office would be Andrew Jackson. When we look at the sheer number of duels the man fought, all it takes is one incident leading to one ATL duel where one bullet finds a vital part of his body.

 

[The Immortal Watch Dog]

I think one President with a very good chance of dying within one year of taking office would be Andrew Jackson. When we look at the sheer number of duels the man fought, all it takes is one incident leading to one ATL duel where one bullet finds a vital part of his body.

He also battled pneumonia almost constantly due to said dueling injuries, PTSD and probably some kind of bipolar disorder. That the many didn't become the first President to commit suicide in office is a testament to his strength of will.