http://obama.senate.gov/speech/060628-call_to_renewal/

Permit me the liberty of quoting from the above, Jim:

“And even if we did have only Christians in our midst, if we expelled every non-Christian from the United States of America, whose Christianity would we teach in the schools? Would we go with James Dobson’s, or Al Sharpton’s? Which passages of Scripture should guide our public policy? Should we go with Leviticus, which suggests slavery is ok and that eating shellfish is abomination? How about Deuteronomy, which suggests stoning your child if he strays from the faith? Or should we just stick to the Sermon on the Mount – a passage that is so radical that it’s doubtful that our own Defense Department would survive its application? So before we get carried away, let’s read our bibles. Folks haven’t been reading their bibles.

“This brings me to my second point. Democracy demands that the religiously motivated translate their concerns into universal, rather than religion-specific, values. It requires that their proposals be subject to argument, and amenable to reason. I may be opposed to abortion for religious reasons, but if I seek to pass a law banning the practice, I cannot simply point to the teachings of my church or evoke God’s will. I have to explain why abortion violates some principle that is accessible to people of all faiths, including those with no faith at all.”

Sounds like an atheist to me.