Nick, all of your theological training is simply no match for the simplicity of the Gospel.
No, I do not believe that 0bama is a Christian. Going to church does not make one a Christian any more than living in a garage makes one a car.
You really need to consider your own relationship with the Saviour.
Where in the Gospel does it say you get to decide who is a Christian? You should pay more attention to the Gospel, and less to the media, instead of letting the media make up your mind.