Summary
The main opposition candidate in Turkey's upcoming presidential elections has threatened to shut down a key American military base by Christmas unless the United States extradites a Muslim preacher accused by Ankara of the failed 2016 coup.
Turkish authorities have repeatedly asked Washington to extradite Fethullah Gulen, who lives in self-exile in Pennsylvania and who is blamed for orchestrating the 2016 coup aimed at unseating President Recep Tayyip Erdogan.
The United States maintains a key base at Incirlik, a military airport located in southern Turkey, as a hub for operations against Daesh (ISIS).
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