I found this in a search:
The renouncing of ones previous citizenship is part of the oath that new US citizens must take, and failing to honor that oath could result in the loss of citizenship in the United States.
from: https://www.legallanguage.com/legal-articles/dual-citizenship-united-states/
Good find. Was Whoregay an anchor baby and never have to take the oath?
Hell, Obama wants to eliminate the part of the oath that requires service to the USA when required. Can other change be far behind.