Obama claimed to be a lifelong Christian as well (on his website in the “fight the smears” section.
He never has produced a baptism certificate nor has he bothered to mark any of the traditional Christian holy days.
He doesn't have to. We know he was born to a muslim and his mother married a second muslim who then listed Obama as a muslim in school records in Indonesia. Obama never had any family connection to Christianity until he would have returned to Hawaii at age 10 or 11 ... and even then, we don't know for sure. Obama's strongest connection to Christianity was joining Rev. Wright's church in Chicago, but he only did that to get street credibility with the African-American community. He has no genuine attachment to Christianity. He got flustered by little kids asking about Jesus when he visited a Boys and Girls Club at Christmas. He's a fake.