In 1918 Behm was a founder member of the German National People's Party (DNVP) and headed its women's committee until 1923. She was a candidate for the party in the 1919 federal elections and was elected to the Weimar National Assembly as one of the first group of female parliamentarians in Germany. She was re-elected to the Reichstag in 1920 and in elections in May and December 1924, remaining in parliament until the 1928 elections.
