Foreign Policy: U.S. Diplomat’s Resignation Signals Wider Exodus From State Department

"In the closing paragraph of her letter, Shackelford called on Tillerson 'to stem the bleeding by showing leadership and a commitment to our people, our mission, and our mandate as the foreign policy arm of the United States.'

'If you are unable to do so effectively within this Administration, I would humbly recommend you follow me out the door.'"