I suspect I have an opinion, but what I don't have is time. Briefly, I think Obama escalated in Afghanistan for political show - he wanted to back his famous 2002 anti-Iraq war speech about not being opposed to all wars, just dumb ones with some suitably fierce rhetoric, so he campaigned on the notion that we had to abandon Iraq and win on the real battlefield of Afghanistan, despite the many obvious obstacle to success. Such obstacles include the fact that Al Qaeda had relocated to Pakistan and that Afghanistan, unlike Iraq, has no real history of a strong central government (due in part to the utterly brutal and divisive mountainous terrain for which the US military, like most others, is not well suited).
No matter - regardless of the situation in 2002 or 2003, as of January 20 2009 the US had better chances for something like a victory in Iraq than in Afghanistan, but Obama has remained committed to pursuing the lesser chance. For now - who doubts that the anti-war left will turn on the Afghan adventure and Obama will be quick to blame Bush and turn with them?
MORE: The Politico covers the 'disenchanted left' angle.