<P> The United States maintained its Constitutional Republic government structure throughout World War II . Certain expediencies were taken within the existing structure of the Federal government, such as conscription and other violations of civil liberties, and the internment and later dispersal of Japanese - Americans . Still, elections were held as scheduled in 1944 . </P> <P> The United States entered World War II with the same Administration that had been at the helm of the nation since 1932, that of Franklin Delano Roosevelt . This Administration had been preparing for war for a while by the time of the attack on Pearl Harbor . </P> <P> President Franklin Delano Roosevelt and Vice President Henry A. Wallace won the election of 1940, and were at the helm of the nation as it prepared for and entered World War II . Roosevelt sought and won an unprecedented fourth term in office in 1944, but this time with Harry S. Truman as his Vice President . Roosevelt, who had been a victim of Polio early in life, died in April 1945, and Truman assumed the Presidency through the end of the war . </P> <Ul> <Li> Secretary of State <Ul> <Li> Cordell Hull pre-war to November 1944 </Li> <Li> Edward Stettinius to war's end </Li> </Ul> </Li> <Li> Secretary of the Interior <Ul> <Li> Harold Ickes throughout the war </Li> </Ul> </Li> <Li> Secretary of Commerce <Ul> <Li> Jesse H. Jones pre-war to June 1945 </Li> <Li> Henry A. Wallace to war's end </Li> </Ul> </Li> <Li> Secretary of the Treasury <Ul> <Li> Henry Morgenthau Jr. pre-war to June 1945 </Li> <Li> Carl Vinson to war's end </Li> </Ul> </Li> <Li> Secretary of Labor <Ul> <Li> Francis Perkins pre-war to June 1945 </Li> <Li> Schwellenback to war's end </Li> </Ul> </Li> <Li> Secretary of War <Ul> <Li> Henry L. Stimson throughout the war </Li> </Ul> </Li> <Li> Secretary of the Navy <Ul> <Li> Frank Knox pre-war to May 1944 </Li> <Li> James V. Forrestal to war's end </Li> </Ul> </Li> <Li> Secretary of Agriculture <Ul> <Li> Claude Wickard pre-war to June 1945 </Li> <Li> Anderson to war's end </Li> </Ul> </Li> <Li> Postmaster General <Ul> <Li> Frank C. Walker pre-war to June 1945 </Li> <Li> Hannegan to war's end </Li> </Ul> </Li> <Li> Attorney General <Ul> <Li> Francis Biddle pre-war to June 1945 </Li> <Li> Tom C. Clark to war's end </Li> </Ul> </Li> <Li> Director of the Federal Bureau of Investigation <Ul> <Li> J. Edgar Hoover throughout the war </Li> </Ul> </Li> </Ul>

President of the united states during world war ii
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