Chandler believed that he had enough support at the 1944 Democratic National Convention to be nominated as Roosevelt 's running mate for that year 's presidential election . The support failed to materialize , however , after the Kentucky delegation , Earle C. Clements in particular , refused to back his nomination . The convention nominated Harry Truman as Roosevelt 's running mate . Truman became president upon Roosevelt 's death in 1945 , and Chandler never forgave Clements for costing him the chance to be US President
1944 Democratic National Convention
1944 Democratic National Convention
Happy Chandler