Haushofer was never a member of the Nazi Party, and did voice disagreements with the party, leading to his brief imprisonment. Haushofer came under suspicion because of his contacts with left wing socialist figures within the Nazi movement (led by Gregor Strasser) and his advocacy of essentially a German–Russian alliance. This Nazi left wing had some connections to the Communist Party of Germany and some of its leaders, especially those who were influenced by the National Bolshevist philosophy of a German–Russian revolutionary alliance, as advocated by Ernst Niekisch, Julius Evola, Ernst Jünger, Hielscher and other figures of the "conservative revolution."