BRUSSELS—European Union and Turkish leaders are holding what is expected to be a tense summit Monday, as friction over the Turkish president’s human rights record squashes any remaining hopes of the country’s accession to the EU, and Western powers express concern over fresh military intervention by Ankara in the Syrian conflict.
In the run-up to the bilateral summit in the Black Sea resort of Varna, EU and Turkish officials traded rebukes, highlighting the poor state of relations between Europe and a country that nonetheless...