“Native born” does not appear in US law. In plain English it is a synonym of natural born.
Harris is a -itch, but she is legally eligible.
When one is born in the USA to parents both of whom were USA citizens when one was born, one is by inherent nature born a USA citizen because no other citizenship outcome is possible. One's natural born allegiance lies 100 percent with the USA.
Kamala Harris was born with three conflicting citizenships and only a weak natural allegiance to the USA.