Breaking news – senior people flee the State Department leaving it empty at the top.

Secretary of State Rex Tillerson’s job running the State Department just got considerably more difficult. The entire senior level of management officials resigned Wednesday, part of an ongoing mass exodus of senior foreign service officers who don’t want to stick around for the Trump era.

Tillerson was actually inside the State Department’s headquarters in Foggy Bottom on Wednesday, taking meetings and getting the lay of the land. I reported Wednesday morning that the Trump team was narrowing its search for his No. 2, and that it was looking to replace the State Department’s long-serving undersecretary for management, Patrick Kennedy. Kennedy, who has been in that job for nine years, was actively involved in the transition and was angling to keep that job under Tillerson, three State Department officials told me.

Then suddenly on Wednesday afternoon, Kennedy and three of his top officials resigned unexpectedly, four State Department officials confirmed. Assistant Secretary of State for Administration Joyce Anne Barr, Assistant Secretary of State for Consular Affairs Michele Bond and Ambassador Gentry O. Smith, director of the Office of Foreign Missions, followed him out the door. All are career foreign service officers who have served under both Republican and Democratic administrations.

It’s not difficult to imagine why senior career foreign service officers would not want to work for Trump, whatever party he belonged to.

In addition, Assistant Secretary of State for Diplomatic Security Gregory Starr retired Jan. 20, and the director of the Bureau of Overseas Building Operations, Lydia Muniz, departed the same day. That amounts to a near-complete housecleaning of all the senior officials that deal with managing the State Department, its overseas posts and its people.

“It’s the single biggest simultaneous departure of institutional memory that anyone can remember, and that’s incredibly difficult to replicate,” said David Wade, who served as State Department chief of staff under Secretary of State John Kerry. “Department expertise in security, management, administrative and consular positions in particular are very difficult to replicate and particularly difficult to find in the private sector.”

Yeeeeah, the private sector doesn’t handle that kind of work. Yet.

Ambassador Richard Boucher, who served as State Department spokesman for Colin Powell and Condoleezza Rice, said that while there’s always a lot of turnover around the time a new administration takes office, traditionally senior officials work with the new team to see who should stay on in their roles and what other jobs might be available. But that’s not what happened this time.

The officials who manage the building and thousands of overseas diplomatic posts are charged with taking care of Americans overseas and protecting U.S. diplomats risking their lives abroad. The career foreign service officers are crucial to those functions as well as to implementing the new president’s agenda, whatever it may be, Boucher said.

“You don’t run foreign policy by making statements, you run it with thousands of people working to implement programs every day,” Boucher said. “To undercut that is to undercut the institution.”

The fall is accelerating.