1. national debt
2. spread of communism
3. President's political opposition
4. arms race
2. spread of communism
Explanation: The Truman Doctrine was request to the US Congress for assistance for Greece and Turkey (weapons, food, aid) in their on-going struggle against Communism within their nations. The Marshall plan was billions of dollars in US aid for the war revenged nations of Europe, following the Second World War. The intention of the Marshall plan was to provide an incentive for the nations of Europe to reject a move to communism and allow a stable transition to democratic governments