In a tweet issued yesterday, President Donald Trump praised the National Security Council (NSC):
70 years ago today, the National Security Council met for the first time. Great history of advising Presidents-then & now! Thanks NSC Staff!
But what IS this “National Security Council”?
Exactly one month after President John F. Kennedy was assassinated, former president Harry S. Truman wrote a commentary, published in The Washington Post. Truman’s essay appeared only in the Post‘s morning edition. Truman wrote “a scathing critique of the Central Intelligence Agency, an entity he had created in 1947.” 
“70 years ago today,” noticed The Donald.
But the invisible government is not limited to the Central Intelligence Agency (CIA). “Nor is it confined to the nine other agencies which comprise what is known as the intelligence community: the National Security Council, the Defense Intelligence Agency, the National Security Agency, Army Intelligence, Navy Intelligence, Air Force Intelligence, the State Department’s Bureau of Intelligence and Research, the Atomic Energy Commission and the Federal Bureau of Investigation.” 
When President Truman signed the National Security Act of 1947, that Act contained no specific provision for covert political operations. It was a year later, in 1948, that the National Security Council “issued a paper in the summer of 1948 authorizing special operations.” This gave birth to the creation of an organization within the CIA to conduct secret political operations. This became the “Plans” Division in 1951. Truman, in his December 1963 essay, maintained he had no idea that this was going to happen when he had signed the Act in 1947. 
The invisible government, lately being called the Deep State, is “generally thought to be under the direct control of the National Security Council.” But, in fact, many of its major decisions “are handled by a small directorate, the name of which is only whispered.” This is the “54/12 Group”, also known as the “Special Group.” Even the U.S. Vice-President, “by law a member of the National Security Council” does not participate in the discussions of the Special Group. 
——- Sources ——-
 “JFK, the unspeakable and me”, by Joseph Bauers. Champaign-Urbana News-Gazette, September 3, 2017, page C-7.
 The Invisible Government, by David Wise and Thomas B. Ross. New York: Random House, 1964. Emphasis added.