For a glimpse at one possible future of U.S. democracy, I highly recommend this longform nonfiction article about Turkey [1]. It goes into detail about "...the resistance of what is commonly referred to as derin devlet, the 'deep state.'" Later on: "The deep state, historians say, has functioned as a kind of shadow government, disseminating propaganda to whip up public fear or destabilizing civilian governments not to its liking."
The indifference with which our intelligence apparatus treats foreigners could easily be (or already has?) turned on U.S. citizens if a similar "deep state" narrative develops in the U.S. All it would take are a couple loosely linked plots successfully pulled off by American citizens to construct a narrative (i.e. rationale) for turning the full forces of the intelligence apparatus onto all U.S. citizens.
The indifference with which our intelligence apparatus treats foreigners could easily be (or already has?) turned on U.S. citizens if a similar "deep state" narrative develops in the U.S. All it would take are a couple loosely linked plots successfully pulled off by American citizens to construct a narrative (i.e. rationale) for turning the full forces of the intelligence apparatus onto all U.S. citizens.
[1]http://www.newyorker.com/reporting/2012/03/12/120312fa_fact_...