Iran

Erdoğan clearly has a strong personal interest in [Reza] Zarrab’s case, as he has raised it at the highest levels of both the Obama and Trump administrations. U.S. judicial proceedings could also hurt the Turkish economy. Since much of Erdoğan’s popularity resulted from his successful economic reforms, his domestic political support would be undermined by a downturn.

[Trump has] given Iran the moral high ground and that is an exceptionally difficult thing to do given the history and reality of Iran's misdeeds at home and in the region. It's just malpractice on the part of an American president.