Turkish police made a hundred arrests across Istanbul and nine other Turkish provinces connected with a wide-ranging investigation of U.S.-based Muslim cleric Fethullah Gulen. Gulen, 72, currently lives in Pennsylvania, but is considered a powerful “arch-foe” of Turkish president Recep Tayyip Erdogan, as the Rudaw news service puts it. Gulen “runs an international Islamic network of schools, businesses, media outlets, and charity organizations from his exile home in Pennsylvania” and is “believed to be deeply influential in the Turkish judicial system and police,” according to Rudaw. In fact, he is so influential that Erdogan has accused him of trying to...