Yeah JFK Sr. is one of the most obvious examples of "almost everything wrong with American politics" from the grooming his family to try and be the nobles and royalty of the country, to basically treating themselves as the Elite who all of the country must obey.

While he isn't the source of that kind of behavior, his was one of the major players keeping it alive in the 20th century and if he was doing it today he would be well noted as the most Swamp creature possible in our country, regardless of any particularly "based" beliefs he may have.