Neither of which could have gone nuclear.
You can thank your lucky stars it was a calm, cool and collected guy who was in the White House during the Cuban Missile Crisis and not one of your heroes.
Look around at your family, house, neighborhood and realize a Democrat ensured you'd still have them, and a Republican would have seen them obliterated rather than accomplish the goal through diplomacy.
By the way, the Bay of Pigs was a legacy from Eisenhower. The CIA assured Kennedy it would work. And there is credible evidence Kennedy would have gotten us out of Vietnam before the end of his first term.