Summary: Saudi Arabia is in the throes of a crisis, but its elite is bitterly divided on how to escape it. Crown Prince Abdullah leads a camp of liberal reformers seeking rapprochement with the West, while Prince Nayef, the interior minister, sides with an anti-American Wahhabi religious establishment that has much in common with al Qaeda. Abdullah cuts a higher profile abroad -- but at home Nayef casts a longer and darker shadow. Michael Scott Doran is Assistant Professor of Near Eastern Studies at Princeton University and Adjunct Senior Fellow at the Council on Foreign Relations. THE DUAL MONARCHY When...