High Quality Content by WIKIPEDIA articles! Clarence Decatur Howe, PC (15 January 1886 – 31 December 1960), generally known as C. D. Howe, was a powerful Canadian Cabinet minister of the Liberal Party. Howe served in the governments of Prime Ministers William Lyon Mackenzie King and Louis St. Laurent continuously from 1935 to 1957. He is credited with transforming the Canadian economy from agriculture-based to industrial.