(D)eep (S)tate
POTUS doesn't have to DELAS anything.
Potus gave everything to Horowitz, Huber & Whitaker.
Those 3 will decide for themselves that the information shouldn't be classified under Executive Order 13526.
(1) conceal violations of law, inefficiency, or administrative error;
(2) prevent embarrassment to a person, organization, or agency;
(3) restrain competition; or
(4) prevent or delay the release of information that does not require protection in the interest
of the national security (Section 1.7).
https://fas.org/sgp/crs/secrecy/R41528.pdf
Botched CIA Communications System Helped Blow Cover of Chinese Agents
https://foreignpolicy.com/2018/08/15/botched-cia-communications-system-helped-blow-cover-chinese-agents-intelligence/
HRC email server was how the Chinese learned about the CIA communication system.