Final answer:
The NSC-68 document was triggered by the belief that the Soviet Union posed a threat to the American way of life. It influenced US foreign policy by advocating for increased defense spending and the need to combat communism.
Step-by-step explanation:
The NSC-68 document, issued by the National Security Council in 1950, was triggered by the belief that the Soviet Union posed a direct threat to the American way of life during the Cold War. It influenced US foreign policy by advocating for increased defense spending and the need to always possess the capability to battle communist forces. The outbreak of the Korean War and the Soviet Union's support for China were significant factors that led to the review in the form of NSC-68.