The Nunes-Trump Memo: Devious Donald Is Demonstrably Full Of Shit

Alan: Anything a president chooses to communicate in public is declassified immediately and automatically. 

Does The President Have The Ability To Declassify Anything At Any Time?

PolitiFact

http://www.politifact.com/truth-o-meter/statements/2017/may/16/james-risch/does-president-have-ability-declassify-anything-an/

Trump Accuses Democrats of Playing Politics with Memo

Citing national security concerns, the White House notified the House Intelligence Committee the president was "unable" to declassify a Democratic memo.

https://www.snopes.com/2018/02/10/trump-accuses-democrats-playing-politics-memo/