How did the Federalist majority in the House of Representatives affect the outcome of the presidential election of 1800?

The Federalist majority in the House of Representatives played a crucial role in the outcome of the 1800 presidential election by determining the winner in a contentious tie between Thomas Jefferson and Aaron Burr. Despite Jefferson receiving more electoral votes, the House, controlled by Federalists, had the power to decide the election. Their eventual choice of Jefferson, influenced by political maneuvering and the desire to prevent Burr's presidency, marked a significant shift in power from Federalists to Democratic-Republicans, ultimately leading to a peaceful transfer of power that set a precedent for future elections.