Yes, there is proof voting fraud in Chicago in 1960 played a huge role in Kennedy's election. When researching an issue, it always helps to get all the facts and examine all the conflicting reports with each other in order to best sort out the truth from the lying propaganda.
These articles are about voting fraud in Chicago, including in the 1960 election.
from your own link:
His research found that Nixon was not “cheated out of Illinois’ electoral votes.”
it always helps to read your own links. lol