Turkey was at a “turning point” Monday, President Recep Tayyip Erdogan said after the opposition fighting his two-decade rule swept municipal elections in Istanbul, the country’s emblematic megapolis, and other major cities. Near-final results showed the main opposition Republican People’s Party (CHP) wresting the main cities and Anatolian provinces that were strongholds for Erdogan’s Islamic conservative AK Party. Top urban centres Istanbul, capital Ankara, Adana, Bursa and Antalya were among municipalities to elect CHP mayors Sunday, less than a year after the knockback of a failed president…