A fierce spat between Qatar and leading Arab nations could add another complication to the already strained relationship between the United States and Turkey. Ankara wants to calm the tension, and Turkish President Recep Tayyip Erdogan has spoken by phone with the leaders of Qatar, Russia, Kuwait, and Saudi Arabia to reduce tensions. He has also expedited legislation to deploy troops to Qatar as part of a military agreement signed in 2014. President Donald Trump, however, supports, and even takes credit for, the Saudi move to isolate its smaller neighbor.