He’s on shaky ground. President Recep Tayyip Erdogan has detained the two leaders of Turkey’s Kurdish opposition party. Hours later, a car bomb shook Diyarbakir, the country’s largest Kurdish-majority city, killing eight and injuring scores. Meanwhile, the business community is jittery: Turkey’s long been seen as a free-market success story, but the lira’s fallen since a failed July coup lent Erdogan license to purge anyone perceived as disloyal. Now businesses have been stripped of licenses and Turkey’s financial regulatory board is so depleted its votes are delayed by months.