It's pretty much agreed that Kennedy stole Illinois from Nixon thanks to the Daley machine in Chicago. But Kennedy got a total of 303 electoral votes, whereas only 268 were needed to win an outright majority of them. Illinois had 26(?) electoral votes, so even if Kennedy hadn't cheated there and lost Illinois, he still had enough to win the national election.
That means that in order to argue that the fraud was decisive and the election was stolen, you would have to demonstrate a decisive amount of chicanery in some other state or states outside of Illinois. What do you know about other states?
And 99% of the world’s population under 21 probably wouldn’t have a clue who either Kennedy or Nixon were.
“There is no certainty that Nixon won both Texas and Illinois [which
he would have had to to do win the Electoral College vote]. What is
certain, however, is that massive voter fraud on Kennedy’s behalf
occurred in both states. In Texas, Kennedy’s margin of victory was
46,000 votes, but Lyndon Johnson’s Lone Star state political machine
could easily have provided that number. In Illinois, Kennedy won by a
bare 9,000 votes, and Mayor Daley, who held back Chicago’s vote until
late in the evening, provided an extraordinary Cook County margin of
victory of 450,000 votes. No thorough investigation of the massive
irregularities was ever conducted, and partisans of Kennedy and Nixon
still debate the bottom line.”
(From “If It’s Not Close They Can’t Cheat,” by Hugh Hewitt, pages 60-61)
The two states where there was significant evidence of voter fraud were Illinois and Texas.
Despite putting a popular Texan on the ticket (LBJ), Kennedy was still very unpopular with rank and file WASP voters in Texas, and lost the non-hispanic white vote in Texas by a slight margin. In order to put him over the top in Texas, the local Democrats reported large numbers of JFK votes in Hispanic regions of the state, and many of these "JFK voters" were likely illegally cast votes -- either they weren't registered, ineligible vote because they were non-citizens, too young to vote, etc. Kennedy winning the Hispanic regions by decisive margins and having big turnout there put him over the top. There was no question many of those RAT voters were illegal aliens. Had those votes been investigated and illegally cast ballots been discarded, there's little question Nixon would have carried Texas.
In Illinois, the vote fraud in Chicago with the Daley machine reporting in the Crook County totals after the state's other 101 counties had reported their numbers has already been discussed.
A third factor that may have resulted in Kennedy losing the popular vote and electoral vote is that a number of deep southern states in the southeast didn't actually vote "for" Kennedy. A lot of the southern RATs couldn't stomach a Massachusetts elite as their nominee, so they voted for "unpledged Democrat electors" to carry their state, not JFK himself. Therefore, although JFK lead by a slight margin in the "popular vote" nationwide and a decent margin in electoral totals nationwide, it was only because the "unpledged Democrat electors" had their arms twisted and were turned into JFK votes when the electoral college met. If they had been following the wishes of "the people" who voted in that state, they would have awarded the state's votes to an alternate RAT, probably a Dixiecrat, so you'd see numbers like 1948 with another RAT gets a couple dozen electoral votes. Without that chunk of the RAT vote, you could make a good case Nixon would have lead Kennedy in the popular vote.
The liberal liars (sorry for the redundancy) deny that there was any significant amount of vote fraud; furthermore, the anecdote (found in Fawn Brodie’s bio of Nixon) that when Nixon had the party flatfoots look into it, they discovered that a recount would turn up irregularities downstate, which might or might not make the whole thing look worse for the Pubbies. So he just said forget it.
The reason Nixon looked so terrible on TV wasn’t the makeup, it was his having been in an accident during the campaign; when he accepted the nomination, he vowed to campaign in person in all 50 states (as opposed to Obama’s 57 states), and his time off to recover his health screwed up that vow (although he did manage to do it, it was a distraction, and another negative to the partisan hacks who already had begun to dominate the press). That accident was probably the single most important reason for his loss in the election.