Available evidence shows no government‑wide "massive declassification effort" under Trump’s second administration that substantially reduces the overall volume of classified federal documents.

What has happened:

• Targeted assassination‑records declassification. Executive Order 14176 (Jan. 23, 2025) orders declassification of records related to the assassinations of JFK, RFK, and MLK, with implementation plans led by the DNI. This is significant but narrowly focused on three historical cases, not a system‑wide program. (en.wikipedia.org)
• Specific large document releases. Following EO 14176, the administration released over 10,000 pages of RFK‑assassination documents, again important but confined to one topic. (nypost.com)
• Issue‑specific transparency laws. The Epstein Files Transparency Act (Nov. 19, 2025) requires the DOJ to release all unclassified records related to Jeffrey Epstein; it does not itself overhaul or substantially shrink the classified universe, and applies only to one case. (en.wikipedia.org)

What has not happened:

• No new overarching classification/declassification order. The general national‑security classification framework continues to be governed by earlier Executive Order 13526 and its declassification rules (e.g., 25‑year automatic declassification), with no Trump‑era replacement or major amendment establishing a broad mass‑declassification program. (archives.gov)
• No evidence of a cross‑agency "large‑scale" declassification initiative. Reviews of the catalog of Trump’s second‑term executive orders show actions on DEI programs, censorship, WHO withdrawal, climate agreements, digital assets, DOGE, etc., but nothing creating a government‑wide drive to systematically declassify large swaths of classified holdings across agencies. (en.wikipedia.org)

Because the prediction specifically called for a **"massive" or "large‑scale" declassification program that substantially reduces the volume of classified documents across the federal government, and what we see instead are narrow, topic‑specific releases and one‑off transparency measures, the prediction is best evaluated as wrong rather than partially fulfilled.