Hilary Baumann Hacker (January 10, 1913 – November 6, 1990) was the Roman Catholic Bishop of Bismarck from 1957 to 1982.Hacker was born to Emil and Sophia (née Bauman) Hacker in New Ulm, Minnesota. He attended Holy Trinity High School for two years before entering Nazareth Hall Preparatory Seminary. He studied at St.