Obama is not going to appoint someone who pushed for the surge as his SofD. If he picks a Republican, it will be someone like [gag]Hagel[gag].
McCain for all his faults is way too much of a hawk for Obama.
I don’t know if they’re really all that different. Both want Gitmo closed. Both call interrogation ‘torture’. They may have disagreed on some minor details, but they’re basically on the same page.