Thomas Jefferson's political career was marked by significant challenges and achievements. He faced opposition during his presidency, particularly regarding the Louisiana Purchase and the Embargo Act of 1807, which limited trade with Europe. Nevertheless, Jefferson successfully promoted the Declaration of Independence and advocated for religious freedom and democratic principles. His establishment of the University of Virginia showcased his commitment to education. Jefferson also grappled with the contradiction of his ownership of slaves while championing liberty. These factors highlight the complexity of his legacy, balancing his contributions to American ideals with the moral dilemmas of his personal beliefs.