“When he became chancellor himself, Hitler wanted to prevent others from doing unto him what he had done unto them. … Hitler had campaigned on the promise of draining the ‘parliamentarian swamp’—den parlamentarischen Sumpf—only to find himself now foundering in a quagmire of partisan politics and banging up against constitutional guardrails. He responded as he invariably did when confronted with dissenting opinions or inconvenient truths: He ignored them and doubled down.”