How could he? He was no where near DC when all of this was evolving. Remember back then...Dan Quayle was a good VP for George 1 for knowledge of foreign affairs and diplomacy. He was marginalized for using an alternative spelling of potatoE.
What I don't understand is how we got from 911...all the terrorists were Saudis...to a situation where they determine our foreign policy. And arming and training ISIS?....didn't anyone in gov have a clue where that was going?
I think that G.W. Bush listened to the cheerleaders for going after Saddam, and that would probably include Dick Cheney, and not enough of the people who were concerned about what a sinkhole for high hopes the Middle East has always seemed to be.