Born Barrack Hussein Obama, Jr, son of a Nairobi-born Harvard-educated economist and a Caucasian anthropologist, his parents divorced when he was 2 years old. His father (deceased in 1982) returned to Kenya, and only saw his son once more. His mother remarried, and moved Barack to Jakarta, Indonesia. He returned to Hawaii at age 10 to live with his grandparents and attend the respected Punahou School on Oahu. He graduated with honors. (As a teenager, he scooped ice cream at Baskins-Robbins!)
http://usliberals.about.com/od/congressionalleadership/p/SenObama.htm
Thanks for that link. It indicates he's a Christion, United Church of Christ. So not a Muslim.