That which clearly reveals the strength and reality of Obama's faith is its ambiguity ... the very thing hated by evangelicals, for whom ambiguity is a lack of faith, and for the evangelical, there is nothing more frightening than the possibility of an "uncertain" faith.
Yet, uncertainty is the essence of our existence, and is the only way of opening doors and keeping them open.
As for his faith being Christian, there is no doubt about that, whatsoever. His childhood and his adulthood have been shaped by the Christian tradition, it's symbols, it's understanding of history and justice and peace, with the Christ at the center, his cradle and his cross.
This isn't about dogma, but vision and hope. Sadly, evangelicals are drowning in dogma - and it's sapping their life, creating huge amounts of anger, frustration and judgment of others.
And, unfortunately, the evangelical definition of faith and Christianity has prevailed in the media and popular, only because the media and America itself has thoroughly dumbed themselves down since the days of Niebuhr and Tillich and Barth and the energies of the Civil Rights Movement with a leader like Martin Luther King, Jr.. This is the rich and deep Christian tradition that shapes Obama, and whatever the outcome may be in the popular imagination, he has done us a great service by disconnecting the Presidency from the deadening and dysfunctional dogma of evangelicalism.
After posting this, I added the following in reply to another comment: