I had not heard this, but Karl Rove quotes Barack Obama from September of 2004 where he is in favor of the surge. I thought he was against the war from the very beginning. I thought his position on the war has never wavered. Listen to it all. Just to put it in context, O'Reilly's question is "Isn't a good strategy for Obama to say the Bush strategy has fowled it up and we need to get out."
Unbelievably O'Reilly offers an Obama defense saying "Obama can say he just changed his mind". In my mind that creates more problems. Obama has stated his position on the war has never changed. What's more to say he was for a surge when the war was not working but is against it now that it isn't, is easy pickins for McCain.