One only needs to be born a U.S. citizen rather than have to be naturalized as a citizen.
That has always been the rule as the Constitution only mentioned or envisioned THREE types of U.S. citizen.
One type were those who were citizens at the time of the adoption of the Constitution. They are all dead.
Currently there are only TWO types of U.S. citizen - those who were born U.S. citizens and those who had to be naturalized as citizens.
C’mon, you know if he runs the Left will suddenly discover the “natural born” clause and raise a humongeous stink and sue if he wins (with John Roberts likely casting the fifth vote to toss him).