Erdoğan says he will never declare Syria ceasefire: Turkish media

Turkish President Recep Tayyip Erdoğan was defiant in a call with President TrumpDonald John TrumpMost Americans break with Trump on Ukraine, but just 45 percent think he should be removed: poll Judge orders Democrats to give notice if they request Trump's NY tax returns Trump's doctor issues letter addressing 'speculation' about visit to Walter Reed MORE on Tuesday, vowing that U.S. sanctions on the country would not force Turkey to declare a ceasefire in northern Syria, according to a Turkish broadcaster.

NTV reported that Erdoğan told reporters on a flight back from Baku, in Azerbaijan, that he told Trump that Turkey would "not negotiate with a terrorist organization," referring to U.S.-backed Kurdish militant groups operating in northern Syria, according to Reuters.

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Turkey's military campaign in northern Syria targeting U.S.-backed Kurdish militia groups that the NATO member considers to be terrorist organizations has caused widespread condemnations from U.S. lawmakers and foreign leaders, though Erdoğan has shown no signs of backing down from the campaign.

Hundreds of members of the ISIS have reportedly escaped from detention facilities in the region as the two U.S. allies battle for control of towns in the area, a situation which military leaders have warned in recent days could lead to a major resurgence of the terrorist group.

The Trump administration has faced widespread criticism over its decision to withdraw U.S. forces from the area ahead of Turkey's invasion. Republicans and Democrats alike have accused the president of abandoning a key ally, the Kurds, who were instrumental in fighting against ISIS in Syria.

Trump has defended his decision to withdraw U.S. troops by minimizing Kurdish contributions to U.S. military efforts, including by telling reporters that Kurdish forces did not assist the U.S. during World War II.

Kurdish forces, meanwhile, have reportedly turned to both Syria's President Bashar Assad and Russia's President Vladimir Putin to help repel invading Turkish forces.