He was a journalist and politician in Germany.Beginning in February 1933, Haubach, like many SPD members, was persecuted by the Nazi régime. After his first arrest in 1934, he was detained in Esterwegen concentration camp. From 1935, he worked as an insurance representative, and later established contacts with the Kreisau Circle. After the failed attempt on Hitler's life at the Wolf's Lair in East Prussia on 20 July 1944, Haubach was arrested and sentenced to death by the Volksgerichtshof. Now very ill, Theodor Haubach was put to death on 23 January 1945 along with Helmuth James Graf von Moltke at Plötzensee Prison in Berlin.