Iranian President Mahmoud Ahmadinejad tried Thursday to entice Egypt into a new alliance that could reshape the turbulent Middle East, speaking of forging “comprehensive” and “unfettered” relations after decades of distrust. A warming of ties between the two regional heavyweights could have uncomfortable repercussions for the U.S. and its wealthy Gulf allies, giving Iran a foothold to spread its influence in Egypt. In turn, Egypt could gain an avenue to influence the fate of Syria, a key ally of Iran, as well as economic benefits. … Ahmadinejad’s visit is the first by an Iranian president in 30 years and he...