Cracked it Q.
"Think Movie" - Seven Days in May. (1964)
HBO Did a TV Remake called The Enemy Within (1994).
Seven Days in May is a 1964 American political thriller motion picture about a military-political cabal's planned takeover of the United States government in reaction to the president's negotiation of a disarmament treaty with the Soviet Union.
Rather the Soviet Union this all revolves around Iran.