A movie from 1991, Kafka, starring Alec Guinness and Jeremy Irons, gives clues to the Deep State. The Deep State exists in “The Castle” and ordinary citizens cannot penetrate its domain. The Castle, on the other hand, can penetrate your domain and even assassinate you, if it so decides.
The emergence of the Deep State is related in a book published in 1964: The Invisible Government, by David Wise and Thomas B. Ross. Inexpensive, used copies of the book are currently available via the Amazon web site.
The Deep State is “an invisible government with the CIA at its center, that conducts the clandestine policies of the United States in the Cold War,” wrote Wise and Ross. But it is “made up of many agencies and people, including the intelligence branches of the State and Defense Departments, of the Army, Navy and Air Force; specialists in codes, propaganda and espionage; and even seemingly private companies and institutions, academic groups, radio stations, a steamship line and a publishing house.”
“But largest and most important of all is the Central Intelligence Agency.” 
Early in his administration, President Donald Trump decided to cancel the CIA’s daily presidential briefing. But, advised Senator Charles Schumer, Trump was “being really dumb” by feuding with the CIA. Said Schumer: “You take on the intelligence community, they have six ways from Sunday at getting back at you.” 
In the early 1950s, the CIA began “Operation Mockingbird”, a large-scale program which attempted to manipulate news media for propaganda purposes. It funded student and cultural organizations and magazines as front organizations.  Later, in the 1970s, Carl Bernstein, of the famous Woodward/Bernstein duo, had an article published in Rolling Stone magazine in which he warned about the CIA’s penetration of the newsrooms. It is curious that Bernstein’s article appeared not too long after the Woodward/Bernstein Watergating of President Richard Nixon.
The Deep State and the Fourth Estate (“news”) now pontificate constantly against President Donald Trump. Gone is even any pretense of impartiality. Where is the balance now in newspapers such as the Washington Post? Sure, you can criticize the president. But a balanced newspaper would also carry reports of a positive nature.
President Trump re-tweeted, on June 16th, a Sean Hannity tweet advertising a monologue on the Deep State. The approximately 12-minute video of Hannity’s monologue, “The deep state’s massive effort to destroy Trump”, can hopefully be viewed at the top of today’s blog entry.
——- Sources ——-
 The Invisible Government, by David Wise and Thomas B. Ross. New York: Random House, 1964.
 “Security Breach”, by Michael J. Glennon. Harper’s magazine, June 2017.
 “Operation Mockingbird”, Wikipedia, June 18, 2017.