“There have been digs on the east coast where artifacts show man traveled here from Europe 20,000 yrs ago.”
Have you got an example?
"Topper is an archaeological site located along the Savannah River in Allendale County, South Carolina in the United States. It is noted as the location of controversial artifacts believed by some archaeologists to indicate human habitation of the New World as far back as 50,000 years ago."
Got several such examples ~ Clovis points are clearly derived from the European tradition.