Thought former President George W. Bush's embattled war doctrine of striking a potential foe before it strikes the U.S. or its allies died in Iraq last decade? Think again. The leading Republican presidential candidates are channeling Bush by hawkishly vowing to strike Iran before it fields a nuclear weapon. What is more, a University of Texas at Austin international relations scholar says "serious people" close to each GOP presidential hopeful see no other option. Read more here.