This is the kind of crap that gives conservatives a bad name. The term “natural born citizen” is a legal definition. Until the late 19th century, a person was a natural born citizen if born in the U.S., in a U.S. territory to a citizen father, to a citizen father who was not a permanent resident of another country, or to a citizen father who was under the authority of the U.S. (i.e. a diplomat).
In the late 19th century it was changed to a citizen parent.
If Obama was born in Hawaii, he is a natural born citizen. If he was born in Kenya, he is a natural born citizen (his mother was not a permanent resident of Kenya and a citizen).
At this point, I am very curious to see his birth certificate, but there has been no plausible scenario put forward to make me doubt he is a natural born citizen.
I thought it meant that the mother didn’t have a C-section. :)