Truman rode alongside John H. Sengstacke and Mayor Richard J. Daley in the 1956 Parade .
John H. Sengstacke was Abbott 's nephew and took over the Chicago Defender in 1948 .
Truman rode alongside John H. Sengstacke , who was Abbott 's nephew and took over the Chicago Defender in 1948 , and Mayor Richard J. Daley in the 1956 Parade .