In many ways, the US president's comments resembled his remarks on Turkey against the backdrop of the controversy surrounding the imprisonment of Andrew Brunson, a USA citizen and evangelical missionary who was convicted by a Turkish court on terrorism-related charges last October.
The last offensive saw Turkish troops and their Syrian rebel allies overrun the Kurdish enclave of Afrin in the northwest, one of several the Kurds had governed since 2012.
Ankara sees the backbone of that alliance, the Kurdish People's Protection Units (YPG), as a terrorist group linked to the Kurdistan Worker's Party (PKK) which has fought a decades-long insurgency against the Turkish state.
US-led operations against IS in Syria have been spearheaded on the ground by the Kurdish-dominated Syrian Democratic Forces (SDF).
We stated that we approved the United States decision to pull out.
With his characteristic behaviour of making abrasive comments on Twitter, Mr Trump threatened on Sunday to "devastate Turkey economically" if it attacked Kurdish forces once USA troops had withdrawn from Syria.
"Will devastate Turkey economically if they hit Kurds", Mr Trump tweeted, while pushing for the creation of a 20-mile (32km) "safe zone".
"Terrorists can't be your partners & allies".
About a Russian-Turkish contract for the purchase of S-400 air defense systems, Kalin said it "has nothing to do with deal for US Patriot missiles".
"Sadly, Trump wants to implement these safe regions through cooperation with Turkey".
Erdogan again told the lawmakers that all Kurds are not the enemy of the Turkish state.
In a telephone conversation, the leaders "discussed the idea of creating a security zone cleared of terrorism in the north of the country", the Turkish presidency said in a statement.
President Trump has announced plans to pull out American troops from Syria, but Bolton indicated a residual force would remain in the country to combat Iran's growing influence.
But in his subsequent tweet, Trump put a more positive spin, noting that he and Erdogan "also spoke about economic development between the U.S. & Turkey - great potential to substantially expand!"
Ankara is well aware of the cost of strained USA ties.
After Trump's threat, the Turkish Lira fell 1.6 percent in value.
"We want to make sure that the folks who fought with us to down the (Islamic State group) have security... and also that terrorists acting out of Syria aren't able to attack Turkey", Pompeo said on a visit to Riyadh.
"The Syrian settlement is progressing, though of course more slowly than we would like", Lavrov said.