the first contested American presidential election, the first presidential election in which political parties played a dominant role, and the only presidential election in which a president and vice president were elected from opposing tickets.
The XYZ Affair (1797-1798) involved an American peace delegation in France, three agents of the French Foreign Minister (labeled as X, Y, and Z in President John Adams’ initial communications with Congress), and the French Foreign Minister’s demand for a bribe from the American delegation. The Affair played a major role in the adoption of the Alien and Sedition Acts
The Alien And Sedition Act, These laws raised the residency requirements for citizenship from 5 to 14 years, authorized the President to deport aliens, and permitted their arrest, imprisonment, and deportation during wartime.
The election of 1800 was a political realignment that ushered in a generation of Democratic-Republican leadership.
The midnight Judge act aka Midnight appointment act represented an effort to solve an issue in the U.S. Supreme Court during the early 19th century.