The former Exxon Mobile chief is just the latest high -
profile departure from the administration, a growing list which includes communications director Hope Hicks, chief strategist Steve Bannon, and chief of
staff Reince Preibus, just to name a few.
The administration has been rocked by high -
profile departures — including Reince Priebus as chief of
staff and James Comey as FBI director — since Trump took office in January 2017.