Mruk won the 1949 mayoral election against the Democratic nominee, Chief City Judge Joseph Hillery and two other candidates. His campaign was buoyed by Polish-Americans who usually voted for Democrats, but were unhappy that the Soviet Union had in fact made Poland part of the Eastern Bloc following World War II.
Mruk won the 1949 mayoral election against Democratic candidate Joseph Hillery, and two other contenders. His victory was fueled by Polish-American voters who usually supported Democrats but were upset about the Soviet Union's annexation of Poland after World War II.