The Canal Zone was never sovewreign US territory.
It was legally part of Panama.
The idea is to be strict about not letting foreign interests and people with foreign leanings take over the national government. We were sloppy about Obama-—a true anti-American-—and look at what it got us.
Biden, OTOH is a jerk but he is an All-American jerk. He has or had a son in the military and has a sense of loyalty to the US.
Natural born citizenship is the last place to be politically correct.
So your saying that children od service members (both US citixens)born abroad in US hospitals are not American citizens?