Obama’s nut case mother WAS a Citizen of the United States.
And Kenyan daddy was a foreigner who naturally transmitted his Kenyan/British subject to Obama Jr. It's all about state allegiances or the lack of a foreign allegiance to be a natural born citizen.
If Ann gave birth to Obama in Canada, as I suspect, she was not a resident 5 years past the age of 14 as the law at that time required for her to pass citizenship to her child.