The Turkish lira fell further against the U.S. Dollar on Tuesday, as the ongoing feud between Ankara and Washington continues without any signs of a resolution.

According to Reuters, the dispute between the two NATO countries has been exasperated by the imprisonment of an American Pastor, Andrew Craig Brunson, who faces terrorism charges related to the failed coup of 2016. After Turkey refused to release the pastor, President Trump ordered tariffs placed on Turkish imports, further deteriorating the relationship and driving the lira down close to 40 percent compared to the U.S. dollar.

The unpredictable fiscal policy of Turkish President Tayyip Erdogan has also added to the crisis. Erdogan recently installed his son-in-law Berat Albayrak as Financial Minister, a decision which made many experts unsure of his next move.

This financial crisis has some leaders in the Turkish government fearing that if the relationship worsens further, it may lead to instability not only domestically, but also in the Middle East. Nowhere is this fear more justified than in Syria, where Turkish-backed forces and allies are already feeling the effects of the depreciated currency.