Russia and Turkey moving closer together, at U.S. expense.
And Turkey trying to blackmail the EU nations into changing many policy stands vis-a-vis Turkey, which if the EU nations cave to it will move Islamists deeper into Europe, and if opposed will sharpen Europe divisions about (a) Nato, (b) expansion of the EU, (c) expansion of Nato and (d) countering Russian influence and intrigue vis-a-vis Ukraine directly and the rest of Europe by covert war craft and trade pressures (energy for western Europe).
Most of that would not be in play now if the EU had never considered expanding the EU to Turkey in the first place, and if Europe had never considered the Middle East refugee problem its problem. ALL the Middle East refugees should have been the problem of Middle East countries, not Europe.
Europe's major powers have dangled EEC/EU membership in front of Turkey since 1960. I doubt there has ever been any serious offer to bring it in. However, Turkey has pretty brisk trade with EU countries, not surprising given who the other neighbors are. The EU-crats wanted to undermine national sovereignty by allowing in a human sea (or subhuman I guess), creating a large, gov't-dependent underclass that would continue to vote for those who promised them benefits. The EU itself exists for no other reason than that it exists, and is a non-accountable imperial bureaucracy which destroys the rather poor democratic traditions member states had in the first place, while undermining their sovereignty. That said, I'm not too worried. Turkey remains the cork in the bottle; whatever follows Erdogan will be worse than Erdogan; meanwhile The Resistance (the real one) has been fighting back against the alien invasion.