Putin is biting his tongue even as Erdogan on Wednesday issued an ultimatum to Syrian President Bashar al-Assad to pull back forces fighting in Idlib with Russian air support by the end of this month.

“We would not want to see our strategic relationship with Russia deteriorate over Syria,” said a senior Turkish official, speaking on condition of anonymity. “But of course, our priority is our own national interests.”

https://ca.yahoo.com/finance/news/putin-swallows-irritation-erdogan-syria-040000804.html