Although Thomas Jefferson was in France serving as United States minister when the Federal Constitution was written in 1787, he was able to influence the development of the federal government through his correspondence. Later his actions as the first secretary of state, vice president, leader of the first political opposition party, and third president of the United States were crucial in shaping the look of the nation's capital and defining the powers of the Constitution and the nature of the emerging republic.
Jefferson played a major role in the planning, design, and construction of a national capitol and the federal district. In the various public offices he held, Jefferson sought to establish a federal government of limited powers. In the 1800 presidential election, Jefferson and Aaron Burr deadlocked, creating a constitutional crisis. However, once Jefferson received sufficient votes in the electoral college, he and the defeated incumbent, John Adams, established the principle that power would be passed peacefully from losers to victors in presidential elections. Jefferson called his election triumph “the second American Revolution.”
While president, Jefferson's principles were tested in many ways. For example, in order to purchase the Louisiana Territory from France he was willing to expand his narrow interpretation of the Constitution. But Jefferson stood firm in ending the importation of slaves and maintaining his view of the separation of church and state. In the end, Jefferson completed two full and eventful terms as president. He also paved the way for James Madison and James Monroe, his political protégés, to succeed him in the presidency.