Andrew Sullivan makes an excellent point
Personally, the one thing that sticks in my craw the most about the Bush era was how much he too his eye off the ball by not making sure he "got" Osama.
I am not arguing that getting Osama bin Laden would have solved all our problems, made the Afghan War a success or won the War on Terror. It doesn't matter. Simple justice demands that the man responsible for 9/11 should not die in his sleep of old age. No, that will not do.
Can Obama's Afghan surge net Osama in the bargain? Impossible to say. Clearly the trail is cold. It's possible Bin Laden may already be dead. But Bush let 8 years go by without a serious effort mounted to bring Bin Laden to justice. If Obama succeeds in capturing or killing Bin Laden it would be the final repudiation of Bushism.