This chapter details how the Cold War Paradigm mindset became institutionalized within the executive branch following the end of World War II. The threat from communism, both external and internal, provided the foundation from which Truman would alter American foreign policy through the Truman Doctrine, but also would focus internally in seeking to stop communist and subversive activities domestically. Once institutionalized, the Cold War Paradigm demonstrates how Truman's actions became a learned response to threats, which altered information policies within the executive branch. Congress heavily supported Truman's actions during this period, as members of Congress also learned and responded to threats. However, the Internal Security Act of 1950 created a rift between the president and Congress over control of government information, setting up an ongoing power struggle that would lead to Eisenhower's creation of executive privilege and Congress's response with the creation of the Moss Subcommittee on government information.