section_path: History and development/Early vice presidents and Twelfth Amendment
section_name: Early vice presidents and Twelfth Amendment
paragraph_text: Early vice presidents and Twelfth Amendment
  
  The first two vice presidents, John Adams and Thomas Jefferson, both of whom gained the office by virtue of being runners-up in presidential contests, presided regularly over Senate proceedings and did much to shape the role of Senate president. Several 19th-century vice presidents—such as George Dallas, Levi Morton, and Garret Hobart —followed their example and led effectively, while others were rarely present.
  
  The emergence of political parties and nationally coordinated election campaigns during the 1790s (which the Constitution's framers had not contemplated) quickly frustrated the election plan in the original Constitution. In the election of 1796, Federalist candidate John Adams won the presidency, but his bitter rival, Democratic-Republican candidate Thomas Jefferson, came second and thus won the vice presidency. As a result, the president and vice president were from opposing parties; and Jefferson used the vice presidency to frustrate the president's policies. Then, four years later, in the election of 1800, Jefferson and fellow Democratic-Republican Aaron Burr each received 73 electoral votes. In the contingent election that followed, Jefferson finally won the presidency on the 36th ballot, leaving Burr the vice presidency. Afterward, the system was overhauled through the Twelfth Amendment in time to be used in the 1804 election.