Ever since the Kennedy assassination, no president has dared to tangle with the national-security establishment at a fundamental level. Everyone in Washington knows where the real power of the federal government is centered. Every president knows that he is expected to operate within the parameters set forth by the national-security establishment and every president since Kennedy has dutifully complied.
It is that President-elect Trump is defying the will of the deep state, military industrial complex base of ultimate power in the United States. That is why he is treading dangerous waters, and risks the fate of JFK.