How did winston churchill’s “iron curtain” speech impact the truman doctrine?

Answer;

Churchill's famous speech convinced many Americans that the USSR was an enemy rather than an ally, which led to the creation of the Truman Doctrine.

Explanation;

It was Churchill who coined the term Iron Curtain in a 1946 speech he delivered in Missouri. It refers to the fact that Eastern Europe was more or less controlled by the Soviet Union.

Iron Curtain was the political, military, and ideological barrier erected by the Soviet Union after World War II to seal off itself and its dependent eastern and central European allies from open contact with the West and other non-communist areas.