Given the question: Max Julius Friedrich Brauer (3 September 1887 2 February 1973) was a German politician of the Social Democratic Party (SPD) and first elected First Mayor of Hamburg after World War II.In 1923 Brauer was mayor of the independent city of Altona. Brauer fled the Nazi regime to the United States in 1933 with a passport of a friend. In 1934 Brauer's German citizenship was revoked and he maintained the U.S. citizenship. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
The answer is:
Office Holder