Sources: Unrest bubbles among Trump's key foreign policy aides - RTRS

Reuters quoted a source familiar with the situation, noting that frustration and differences are mounting among leading foreign policy officials in Trump's administration, as they face policy and bureaucratic defeats and lack of independence to do their jobs.

A source noted: Tillerson was "very upset at not having autonomy, independence and control over his own department and the ability to do the job the way the job ... is traditionally done."

The source added: “The situation doesn't seem to be getting any better, and in some respects appears to be getting worse."