| I think you're being misinformed by an out of context quote. “Secret. This is secret information. Look, look at this,” Trump says at one point, according to the transcript. “This was done by the military and given to me.” Specifically in that excerpt Trump is referencing information about Milley leaking secret information. In the full context, Trump was saying to that reporter that Milley was the leaking plans to attack Iran. This was the "secret information", given to Trump confirming this by the Military. Trump is claiming that Milley was the one that was leaking classified information of "Trumps plans" to attack Iran.
Trump had no such ambitions, but it was Milley that wanted such an attack to happen. As president, it's part of his administration's record that he received that information from the Military. If he want to let the American Public know this information he has the constitutional authority to do so. However, Milley has no authority to disclose secret military plans, and has committed a crime. |
But he cannot disclose at least a large amount of what he has been accused of leaking. This article from the American Bar Association[0] is a good primer on what can and cannot be declassified at whim and specifically these two parts are important to this discussion.
>> In all cases, however, a formal procedure is required so governmental agencies know with certainty what has been declassified and decisions memorialized. A federal appeals court in a 2020 Freedom of Information Act case, New York Times v. CIA, underscored that point: “Declassification cannot occur unless designated officials follow specified procedures,” the court said.
>> Some secrets, such as information related to nuclear weapons, are handled separately under a specific statutory scheme that Congress has adopted under the Atomic Energy Act. Those secrets cannot be automatically declassified by the president alone and require, by law, extensive consultation with executive branch agencies.
So it looks like regardless of if that quote is out of context that the President does not have the sole authority to declassify everything.
[0] - https://www.americanbar.org/news/abanews/aba-news-archives/2...