The problem with which this investigation is concerned is the description and. analysis of President Harry S Truman's use of his Presidential prerogative in recalling the Republican Eightieth Congress into special session on July 26, 1948. The results of this investigation indicate that President Truman's call for a special session of the Eightieth Congress on July 26, 1948, was primarily a tactic in his campaign strategy for the election of that year. However, the full significance of the session can be understood only by taking into account the political environment of the postwar period and the executive-legislative relationships between President Truman and the Republican Eightieth Congress on domestic legislation. The special session was a microcosm of the political events of 1948 and the relationship between the President and the Eightieth Congress.