He before to embarking on his political career, Summerfield had become well known in Michigan as the owner of one of the largest General Motors automobile dealerships in the state; and one of the largest in the Midwest.
Gertrude Miriam Summerfield MacArthur, (Born in Flint, Michigan on November 26, 1920 - Died in Flint, Michigan on July 17, 2008).