A Turkey-brokered agreement to hold the first Palestinian elections in 15 years suggests a new appetite for cooperation between the territories’ staunch political rivals, along with a new mediating role for Ankara, in light of warming Israeli-Arab Gulf relations. On Sept. 23-24, high-level representatives from Palestinian parties Fatah and Hamas met in Istanbul for a two-day discussion hosted by Turkey’s foreign ministry. After the meeting, a Hamas spokesperson announced that the two parties -- which have been engaged in more than a decade of infighting -- had agreed to begin planning elections within six months. ...