A better question would be, Was the 1960 Election Stolen? (by JFK)
Of course! However, it was back in a time when such possibilities were not to be pursued or seriously discussed!
Having lived long enough to have personally seen/heard of/investigated...:
Multiple voting by individuals, ballot box stuffing, candidates (IN THE USA) being murdered shortly before/after their election, ballots "destroyed or "disappearing", etc....
GIVE ME A BREAK!!! While the vast majority of individuals naively believe that our voting process is, somehow, PRISTINE AND PURE, human nature dictates otherwise!
As to which party is less PRISTINE & PURE, I shall leave that to the reader to determine.....
Not by Kennedy. It was a 'gift' from the boys in Chicago. Well, sort of a gift. There were strings attached and JFK tried to cut them. Bad idea, according to Sam and Chuck Giancana. ("Doublecross" -- 1992. Warner Books).