Erdogan and Turkey supported and aided ISIS. Recruits, supplies and funds passed through the Turkish border into Raqqa and other parts of ISIS controlled Syria. The oil ISIS stole was marketed in Turkey. Erdogan no doubt personally took his cut. If Trump really wants to hurt him find and confiscate or freeze his hidden Swiss and other off shore hidden accounts.
Erdogan supported Jihadi’s in Syria prior to the rapid formation of ISIS. So did Obama.
They both ran weapons into Syria, from those supplied to those overthrowing Muammar Gaddafi. Hence those that were in the annex near the mission in Benghazi.
Even Assad bought illegal oil form ISIS at some point.
Erdogan is a truly evil Islamist Dictator who employed 3,000 ISIS members and more al Qaeda Terrorists to take over Efrin (Afrin).
Until very recently Erdogan was afraid of acting against the CHP (Kemalists). He feared them. They had power in Turkey since the formation of Turkey, until Erdogan came to power. He used the Faux Coup to neuter the Kemalists. This outspoken CHP MP is correct about the Islamists.
This will end badly for Turkey and the region.
The US should file a formal complain with the UN’s Human Rights Commission/er and the International Criminal Court (at the Hague?), accusing Erdogan of “war crimes” by preventing the apprehension of wanted ISIS war criminals.
Let’s see how that would sit with the mental case who is a human Turkey.