Part I -- What constitutes a status of "natural-born citizen"?
From the U.S. Code Online via GPO Access
[Laws in effect as of January 3, 2007]
TITLE 8--ALIENS AND NATIONALITY
CHAPTER 12--IMMIGRATION AND NATIONALITY
SUBCHAPTER III--NATIONALITY AND NATURALIZATION
Part I--Nationality at Birth and Collective Naturalization
Sec. 1401. Nationals and citizens of United States at birth
The following shall be nationals and citizens of the United States at birth:
(g) a person born outside the geographical limits of the United States and its outlying possessions of parents one of whom is an alien, and the other a citizen of the United States who, prior to the birth of such person, was physically present in the United States or its outlying possessions for a period or periods totaling not less than five years, at least two of which were after attaining the age of fourteen years:[...]________________________________________________
The above is from the Naturalization Act, codified in the United States Code, and in effect as of this writing.
This is too long for my blog-site to handle all at once, so read the other two parts. Parts II and III will show additional research that clears up any doubt...