Wallraf served as a (supreme district administrator) in the Prussian administration from 1888 to 1898, first for the district of
Malmedy, then for the district of
Sankt Goar. After serving in the provincial administration of the
Rhine Province in
Koblenz, he became head of the police in
Aachen, where he served from 1900 to 1903. On 13 July 1907, after lengthy negotiations involving his father-in-law Joseph Pauli, Wallraf was unanimously elected
mayor of Cologne, as a Catholic following two Protestant mayors and as a compromise candidate who was acceptable to all factions. As mayor of Cologne, he was also a member of the
Prussian House of Lords. He resigned in August 1917 when he was offered the position of state secretary (similar to a minister in other parliamentary systems) in the
Ministry of the Interior and was replaced as mayor by
Konrad Adenauer, who had worked as his deputy before and who was married to Wallraf's niece Emma Weyer. As State Secretary of the Interior in the
cabinet of Reich Chancellor
Georg von Hertling, Wallraf supported the suppression of the
German strike of January 1918. In addition to his tenure as interior minister (23 October 1917 – 6 October 1918), Wallraf was minister without portfolio in the state government of Prussia from 7 January to 4 October 1918. From 1921 to 1924, Wallraf was a member of the
Landtag of Prussia and from 1924 to 1930 of the
Reichstag, representing the national-conservative
German National People's Party (DNVP). Wallraf was elected
President of the Reichstag on 28 May 1924, after the
May 1924 German federal election, as the DNVP together with the
Agricultural League was the largest parliamentary group. He was replaced by his predecessor
Paul Löbe on 7 January 1925 after the
December 1924 German federal election. During 1924, Wallraf was among those DNVP members who did not oppose the
Dawes Plan, which caused a bitter dispute within the DNVP. Wallraf became a member of the
Nazi Party on 1 May 1933. == Personal life ==