This monograph analyzes the current political tensions between the United States and Turkey and suggests ways to manage them. The two countries have been strategic allies since at least the end of World War II—Turkey became a North Atlantic Treaty Organization member and participated with its military forces in the Korea War, and during the Cold War protected NATO’s southern flank against Soviet communism, and Turkey’s military and intelligence services maintained close relationships with their Western and Israeli counterparts. These relationships were not without problems, due mostly to differences over minority and civil rights in Turkey and over Turkey’s invasion of Cyprus in 1973 and continued tensions with Greece. The special relationship with the United States was put to the final test after the Islamic conservative populist political party, Justice and Development, and its current leader, Recep Tayyip Erdogan, came to power in 2002. Turkey opposed the US invasion of Iraq in 2003 and the NATO-backed regime change in Libya in 2011. Most recently, Turkey has had strained relations with Cyprus, Greece, and Israel—all key US allies—and has alienated the US Congress and select NATO members further by its October 2019 invasion of Syria against Kurdish forces aligned with the US military against the Islamic State in Iraq and Syria, all against a background of a military rapprochement with Russia. This monograph highlights differences between US agencies concerning Turkey and ways to reconcile them, and offers several policy recommendations for new directions.