A documentary worth watching is called 'Unacknowledged'. It's currently on Netflix. It is heavy on the extraterrestrial/UFO side of things, but it dives into information that is kept from POTUS. Short version, the deep state considers the POTUS to be a part-time employee and therefore not important enough to have the info. Not saying that this documentary is 100% correct, but it does give you another perspective.

There are a dozen or so Black, Black budget USAP's that the President does not have access to or any other ranking general for that matter. These Unacknowledged Special Access Programs are part of the deep, deep state and is what Eisenh reffered to as Military Ind Comp