President Recep Tayyip Erdogan’s warnings that Turkey’s refugee deal with the European Union will collapse if it fails to waive visa restrictions for Turks have become more frequent, almost routine in recent days, signaling a looming and serious crisis in Turkish-EU ties.

The emergency rule Erdogan declared after surviving the failed July 15 coup has meant the suspension of a series of basic rights and freedoms in Turkey, making the planned visa waiver even more difficult and hastening the course toward collision. The row was aggravated by a psychological factor as Erdogan feels anger and mistrust toward EU leaders who, according to him, failed to extend him adequate support after the putsch.

Since the beginning of August, Erdogan has grown markedly tougher on the issue, warning every five days on average that Turkey will stop readmitting refugees if the EU fails to introduce visa-free travel for Turks, with the Turkish press calling his warnings a “showdown.”

In his most recent challenge Aug. 12, Erdogan told Germany’s RTL television, “The visa liberalization and readmission are very important. The process is currently ongoing. Unfortunately, Europe has failed to keep its promise on the issue. We want to take steps simultaneously. If [the visa waiver] happens, fine. If not, I’m sorry but we’ll stop the readmissions.” He had made similar remarks on Aug. 2 and Aug. 8 as well.