There are three and only three and there has only ever been three and thatbhas been my argument for YEARS. One category are all now deceased. The remaining two are naturalized and natural born. Any US citizen who was not naturalized, but who became a citizen via the natural act of being born is a natural born citizen.
Currently there are two and only two ways of attaining US citizenship, being born a citizen or being naturalized as a citizen.
As I stated before we are, I think, getting closer. I don’t believe the history of the Constitution or the Constitution words support same exact meaning to being ‘born a citizen’ and being a ‘natural born citizen’. My interest in this started in the 2nd grade in the 1920s. It took a few years of looking at the Constitution to convince me that my childhood thoughts of becoming POTUSA were not realizable because I was born of immigrant, not yet naturalized parents.