Iran is more troubling, but Obama's difficulty is his promise to respect the feelings of our allies. Well Sarkozy is the unofficial leader in Europe and he is adamant about a non nuke Iran. Obama may have to follow Europe in this regard.
His tax policies and especially the cap gains and dividend increases could be very bad news if people begin pulling their money out of the market and look for the tax free return of state and local bonds. The market could tank and that would lead to serious results, but it would play into the Congressional Dem hands of constructing a command economy.
Which leads to your last point. I think the dangers to the Constitution are paramount, given Obama's self described criteria for Justices. he will replace at least three with young activists who are determined to create a central, not federal govt, with the power to accomplish what they believe to be the Good. The Constitutional obstacles to this goal will be removed, leaving the U.S.A., at best, a Centralized European Socialist Democracy where the people's rights are no longer protected by the govt., but given by the govt.
There is an ‘extra-dimension’ to Afghanistan that doesn’t exist in Iraq: Afghanistan has always been a NATO operation. Whenever NATO is involved there are always “other considerations” besides domestic politics.
I agree that Obama will likely fold a strong hand in Iraq, but Afghanistan is not ‘automatic’.