American bases and embassies are not US territory. That is simply an urban myth. If they were American territory, the host countries could not kick us out of them without leading to a war. Being born on a military base or embassy does not, in of itself, grant citizenship.
But, the children of American citizens born overseas, whether on a military base or not, are American citizens from birth and qualify to serve as President under the COTUS.
You, and Donofrio, are creating artificial distinctions that do no exist in either the COTUS or Federal law. There are only two classes of American citizen: naturalized (who cannot serve as President) and citizens from birth (who can).
We’re both shooting at a target which is fuzzy and ill-defined. Who can say which of us is actually on target?
We need the SC to clarify this issue once and for all.