Until 20 years ago, Obama was an atheist raised by atheists. He moved to Chicago having no roots in the area. He was told by the Democrat Machine that
1. Atheist don't get elected in ChicagoNow for the proof of my thinking.
2. Rev Wright could provide street cred in the neighborhood
So he joined the Church and became a "Christian". Wright has shown that his "church" is really just a money making scheme based on black politics and pandering to blacks' worst fears.
Obama has squeezed all he can out of the bitter black urban church and now can move up with his elite prep school/ ivy league friends. He can still claim the kind of religion that you get from Harvard that doesn't actually require going to church. Just like he can have the kind of Harvard patriotism that doesn't require respecting the flag.
Well, that isn't going to cut it. There's too much history there, too many years of acquiescence and non-denial to throw away in a press conference or two.