On June 21, 1788, New Hampshire ratified the United States Constitution by a margin of ten votes, becoming the ninth state to do so and crossing the threshold required to bring the document into effect. It nearly didn't happen. Months earlier, the state's ratifying convention had adjourned rather than risk a losing vote. What followed was a story of political maneuvering, genuine ideological conflict, and a fragile consensus built without any guarantee that the largest states would follow. This is how the Constitution became law.