Just as in the case with the modern flush toilet, when something like the United States has become an unbridled success, every Tom, Dick and Harry, and their individual cultural iconography, wants credit for the discovery.
So far we have the Vikings, The Spanish and Portuguese ( Columbus) , the Chinese ( Zheng He),The Scots ( Clan Sinclair), and the Iraquis ( Mesopotamians in South America according to Sitchin), who "dsicovered America.".
America was discovered truly in 1776 by the men who signed the Declaration of Independence, and those who wrote the US Constitution.Any fool should understand this. This fool does.
