Merely being a citizen is not enough to be a president.
IF he was born in Kenya, and his dad is a Kenyan, and his parents were married. Guess what? He’s a Kenyan.
If he was not born in the US, he probably isn’t a ‘natural born citizen’ and therefore isn’t eligible to be president.
Show me any unquestionable documentation that he was even born in America, all we have is a web posting of a bad forgery of an Hawaiian BC. It’s come out in several versions, each new issue fixes the errors that bloggers caught in the previous generation...
The laws in effect at the time of birth determine whether or not someone would be an American citizen at birth, which is what “natural born citizen” means. A non-natural born citizen would be one that has to get “naturalized” to become a citizen.
Here’s a link to the laws & the changes that have gone through in the 20th century.
http://www.americanlaw.com/citabrd.html