"President @RT_Erdogan of Turkey has very strongly informed me that he will eradicate whatever is left of ISIS in Syria," Trump said in a Tweet around midnight Sunday, using another acronym for the jihadist group.

Repeating a pattern of admiring comments towards global strongmen, Trump added that Erdogan "is a man who can do it."

Trump appeared to be elaborating on a phone call he had earlier on Sunday with Turkey's President Recep Tayyip Erdogan.

They discussed Trump's withdrawal of the US troops which were assisting in the multinational fight against IS, and whose departure has shocked global partners and American politicians alike.

"Our troops are coming home!" Trump said in his late-Sunday tweet.