majority. He won by sweeping the electoral votes of New England and winning votes from several other swing states, especially the states of the Mid-Atlantic region. Jefferson received 68 electoral votes and was elected vice president. Former Governor Thomas Pinckney of South Carolina, a Federalist, finished with 59 electoral votes, while Senator Aaron Burr, a Democratic-Republican from New York, won 30 electoral votes. The remaining 48 electoral votes were dispersed among nine other candidates. Several electors cast one vote for a Federalist candidate and one for a Democratic-Republican. The election marked the formation of the First Party System, and established a rivalry between Federalist New England and the Democratic-Republican South, with the middle states holding the balance of power (New York and Maryland were the crucial swing states, and between them only voted for a loser once between 1789 and 1820). Candidates With Washington retiring after two terms, both parties sought the presidency for the first time. Before the ratification of the 12th Amendment in 1804, each elector was to vote for two persons but was not able to indicate which vote was for president and which for vice president. Instead, the recipient of the most electoral votes would become president and the runner-up vice president. As a result, both parties ran multiple candidates for president, in hopes of keeping one of their opponents from being the runner-up. These candidates were the equivalent of modern-day running mates, but under the law, they were all candidates for president. Thus, both Adams and Jefferson were technically opposed by several members of their own parties. The plan was for one of the electors to cast a vote for the main party nominee (Adams or Jefferson) and a candidate besides the primary running mate, thus ensuring that the main nominee would have one more vote than his running mate. Federalist candidates The Federalists' nominee was John Adams of Massachusetts, the incumbent vice president and a leading voice during the Revolutionary period. Most Federalist leaders viewed Adams, who had twice been elected vice president, as Washington's natural heir. Adams's main running mate was Thomas Pinckney, a former governor of South Carolina who had negotiated the Treaty of San Lorenzo with Spain. Pinckney agreed to run after the first choice of many party leaders, former Governor Patrick Henry of Virginia, declined. Alexander Hamilton, who competed with Adams for leadership of the party, worked behind the scenes