[Robert DeLong]

George Washington was born in Va.

[frog in a pot]

Were the various presidents you cite born before the existence of the U.S. created in 1787?
If so, under what theory could they be deemed to have been born in the U.S.?

Most importantly, were the parents of the various presidents you cite, citizens of the yet-to-be-created U.S. when their sons were born?

Bonus question:
The founders allowed for mere citizens to be president, why was it not possible for them to immediately require NBC but rather to require the higher form of citizenship after the passage of time?