BRAUN, OTTO ), German statesman, entered the Prussian Diet in 1912 as a representative of the Social Democrats and became a member of the Reichstag in 1920. From 1918 to 1921 he was Prussian minister of agriculture and an opponent of the landowners. He was Prussian prime minister 1920-21, 1922, and 1925-33, and was a leader of the Social Demo crats until their suppression by Hitler in 1933.