President Donald Trump said that the European nations had been a “tremendous disappointment” for refusing to take back captured Islamic State fighters currently being held in Syria. The not-so-veiled threat seemed to suggest that the president was ready to release them if countries like France, Germany and the U.K. didn’t repatriate them soon. “My people called a lot and said take your ISIS fighters,” he said during this Sunday address in which he detailed the killing of Islamic State leader Abu Bakr al-Baghdadi in a Saturday raid. He then said, “The U.S. tax payer isn’t going to pay to look after other countries’ ISIS fighters.”