Who was First Lady during Franklin D. Roosevelt's presidency?

Who was Franklin D. Roosevelt's first Vice President? Under which president did John Nance Garner serve as Vice President? Under which president did Henry A. Wallace serve as Vice President? Under which president did Harry S. Truman serve as Vice President? Eleanor Roosevelt was married to which president? Which number president was Harry S. Truman? Who succeeded Harry S. Truman as President of the United States? Who was President immediately before Harry S. Truman?