With hindsight, how could Wilhelm Canaris remove Hitler in 1934 without ending up imprisoned by 1945?
Short answerAct while Hitler was still vulnerable, control who was blamed, exploit the resulting factional struggle, and manage the succession.
NotesIn this counterfactual, Canaris acts while Hitler is still politically vulnerable. His access, personnel, and freedom of movement are treated as sufficient to arrange Hitler's removal in 1934. Survival would depend on directing blame and controlling the resulting factional struggle. Canaris or a chosen ally could then claim credit for restoring order.