From Bearing Arms:

In Gabbard’s announcement, it was stated that her office was acting on a Trump executive order. The order is “aimed at rebuilding trust in the IC — starting with investigating weaponization, rooting out deep-seeded politicization, exposing unauthorized disclosures of classified intelligence, and declassifying information that serves a public interest.”

“Declassified Strategic Implementation Plan for Countering Domestic Terrorism from the Biden Administration” was the first document declassified and released. The declassification date stamped on the document is April 9, one day after Gabbard’s announcement.

The Biden era document is not dated, but states it’s said that it’s resultant of guidance issued by the intelligence agencies in March of 2021.