He was the youngest person to be elected president (though not the youngest person to serve as president - Theodore Roosevelt was only 42 when he ascended to the presidency after William McKinley's assassination), as well as the first Roman Catholic to be elected president.
Because it was the first election of an American president.
Presuming you are talking about the American Presidential Election, there is a black candidate, and a woman candidate for Vice-President. NB I'm British, and I follow these things, shame on you for not doing so.
Jackie
His sexual affair with Monica Lewenski.
Lancer
January 20 1961
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Senator
Black Jack
In the end -Commander in Chief (as president).
Yes.
Yes, he was JFK's younger brother.