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In reading Robert Dallek's Franklin D. Roosevelt: A Political Life (2017), I realized that FDR's health was already severely declining before he began his third term. On Election Night 1940, he asked to be alone while receiving the results. Dallek suggests that Roosevelt was having some kind of health episode as had become common by that point. In May 1941, FDR was "sidelined by illness" according to Dallek. At another point early in his third term, Dallek's description leads one to believe FDR was near death.

What if, some time between 01/20/1941 and 12/06/1941, FDR were to die in office? How would Wallace handle the lead-up to Pearl Harbor, Pearl Harbor itself, and the beginning of WWII?
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