There was a time when the construction cranes dotting the Istanbul skyline seemed a sign of Turkey's economic promise. But in the tumultuous weeks leading up to Turkey's pivotal municipal elections, the same blueprints and construction tenders that were once so widely celebrated have become ammunition for the country's rival political forces. Recep Tayyip Erdogan is the latest Turkish politician to use construction projects to create a power network -- and to see that network threatened by corruption scandals....