That worked with Allende in Chile, Diem in South Vietnam, and Ceaucescu in Romania. Hitler and Stalin's purges quickly eliminated their enemies. The coup leaders failed to knock out Erdogan immediately.
I suspect the Russians supported the coup attempt. Russia is allied with the more secular factions in the Middle East, supporting the Syrian government while the U.S. and NATO are on the side of one of the major terrorist factions. The recent improvement in Israeli-Russian relations is reflective of the recognition on Netanyahu's part that Putin is more reliable than Obama.
If Trump is elected President, the United States, Russia, and Israel will be playing on the same team. This will bode well in dealing with the Islamic terrorist scum.
Unless it is true that the coup really was just the minority Gulenist faction of the military and the majority of the military, who are (hopefully) Kemalist, weren’t backing it or even aware.