If his father really was BO, Sr. then he had, at birth, dual citizenship and it is very common. I have a good friend, a naturalized US citizen who was born in Spain, and is married an American woman. His seven children have dual citizenship in both Spain and the US. But there is no debate over whether they are natural born citizens of the US. They most certainly are.
Then Obama didn't and doesn't meet the definition of "natural born citizen" arrived at by the Senate staffers who researched the subject thoroughly in their 2008 Senate resolution SR511 -- the same as that defined way back in the Venus decision: born in the country of parents who are its citizens.
And in this post, it tries to again conflate, where born with citizenship of the PARENTS. These are the usual obfuscatory ploys of the obamanoid gang at FR. Honesty is not their strong suit.