PRINCETON – The dramatic battle between Turkey’s ruling Justice and Development Party (AKP) and its erstwhile ally, the “Hizmet” religious movement led by the self-exiled cleric Fethullah Gülen, has begun to expose the massive rule-of-law violations that these two groups employed to consolidate their power. Prosecutors widely thought to be Gülen sympathizers have launched a wide-ranging corruption probe that has so far ensnared four ministers and reaches all the way to Prime Minister Recep Tayyip Erdoğan’s son.