As a German National People's Party politician, he was a member of the Reichstag from 1924 to 1930 and briefly served as its President in 1924/25.

[2] He obtained his Abitur at the Apostelgymnasium [de] in 1878, and studied law at the universities of Bonn, Heidelberg and Leipzig from 1878 to 1881.

[6][7] 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[8] and was replaced as mayor by Konrad Adenauer, who had worked as his deputy before[9] and who was married to Wallraf's niece Emma Weyer.

[10] 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.

[3] 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).