Turkey is a NATO partner and a key American ally in the Middle East. At one point President Obama even saw President Erdogan as a role model for Muslim leaders. Not anymore. Washington's been watching nervously as Erdogan has turned increasingly autocratic. Anti-American sentiment in Turkey has snowballed in the wake of last month's failed coup, which many Turks blame on an exiled Muslim cleric living in the US. Vice President Biden was in Ankara yesterday to smooth over strained relations, but can the growing rifts be healed given these two nations' clashing alliances in the fight against ISIS?