He's lying. Any Christian would have to know that Obama is not a Christian by any definition of the term.
I don't know why these guys try to skirt this.
They should just respond either by saying "no" and then responding to the firestorm or just say "I don't know what religion he is. You'll have to ask him."
Since it’s a loaded question, then pointing that out and castigating the reporter for being so journalistically delinquent as to ask one should have been the sole response.