[centurion316]

No Amendment can reach back in time and alter birth status. They weren't born citizens at all. Therefore, they could never have been natural-born citizens.

Could be, but since that class of people are all dead, we'll never know for sure.

[RegulatorCountry]

People who were not born citizens at all could not possibly have ever been natural-born citizens. It’s a state or condition present at birth. It either was or was not present. It was not present.