If I remember right all the US president can trace their family tree back to a common ancestor, King John Plantagenet of England. King John was the one who surrendered the English Crown to the papal legate, meaning England had become a vassal state and possession of the Vatican. It was around the time of the Magna Carta…1213 or 1215?
btw…the president who couldn't trace his ancestry back to King John was Martin Van Buren.