How was Mission to Moscow connected to President Franklin D. Roosevelt’s wartime policy?

Mission to Moscow (1943) was produced by Warner Brothers in direct response to a confidential request from U.S. President Franklin D. Roosevelt. The film was intended to help marshal public support for the aid the United States was providing to the Soviet Union during World War II.1

Based on the memoir of former U.S. ambassador Joseph E. Davies, the film featured a blatantly pro-Soviet message that aligned with the wartime policy of the Roosevelt administration. However, this political stance became a significant liability during the subsequent McCarthy era, leading to scrutiny from the House Un-American Activities Committee in 1947.1