Top officials like Mr. Tillerson and Mr. Mattis have expressed concern about the effect on American relations with European allies if Mr. Trump were to unilaterally pull out, especially after he already announced his intention to back out of the Paris climate change accord that Europeans strongly support.
Too damn bad. The region has been an absolute mess for 100 years because of our 'allies' and the creation/management of these nations by them, post WWI.