Cengiz Candar writes, “The fate of Aleppo has the potential to seal the fate of [President Recep Tayyip] Erdogan's regime in Turkey. Too many of Erdogan's eggs are placed in the basket of northern Syrian geopolitics, and most of them are likely to crack.”

In other words, Turkey’s Syria policy, which since 2011 has facilitated the rise of jihadi groups allied with Jabhat al-Nusra, al-Qaeda’s largest affiliate ever, may be on the brink of collapse, along with those remaining Jabhat al-Nusra terrorists in Aleppo who are holding the besieged citizens of the city hostage under brutal bombardment by the Syrian military and its allies.

On Dec. 1, United Nations Special Envoy for Syria Staffan de Mistura again called for Jabhat al-Nusra fighters to leave the city, saying that their departure “will contribute to avoiding bloodshed and increase our leverage on insisting for an urgent pause.”

A series of quick victories by Syrian military and pro-government forces against Turkish-backed armed groups in Aleppo last week compelled Erdogan to declare on Nov. 29 that his country’s military had entered Syria to “put an end to state terror and to [Syrian President Bashar al-] Assad’s rule,” upsetting, for the moment, fragile negotiations over Aleppo, according to the Financial Times.