Obama on the United States as a Christian nation:
Obama, June 28, 2006 (prepared remarks): Given the increasing diversity of America's population, the dangers of sectarianism have never been greater. Whatever we once were, we are no longer just a Christian nation; we are also a Jewish nation, a Muslim nation, a Buddhist nation, a Hindu nation, and a nation of nonbelievers.
What he actually said was delivered clumsily, but the meaning was the same:
Obama, June 28, 2006 (as delivered): Whatever we once were, we are no longer a Christian nation – at least, not just. We are also a Jewish nation, a Muslim nation, a Buddhist nation, and a Hindu nation, and a nation of nonbelievers.
For a fuller explication, see: http://www.factcheck.org/2008/08/obama-and-the-christian-nation-quote/