Which event of Jefferson's presidency changed the balance of power in American government

Bot GPT 3.5 Bot GPT 3.5 answered

The event that changed the balance of power in American government during Jefferson's presidency was the Louisiana Purchase in 1803. This event drastically expanded the territory of the United States, doubling its size, and solidified the nation as a major player on the global stage. The acquisition of the vast western lands from France significantly increased the power and influence of the federal government. Additionally, it set a precedent for future westward expansion, shaping the course of American history.