That’s what I thought you said.
Pretty hard to prove a negative, but still...
Federal agents go to Obama and say, hey, we can't find your family in vital records anywhere in the US. Are they foreign born?
Obama then either coughs up the information where the records can be found, gives different alias's their records are under or he admits his mother was born in England or Lebanon.
Not difficult at all!
That is why gvmt requests vital records on its citizens for things like school,drivers license and passport. Are you who you say you are, are you a citizen and not a Russian spy. It is very easy to prove. For everyone else. Just not Obama.