The purpose of this thesis is to reveal the slanderous rhetoric of the Federalist and Republican parties during the American presidential election of 1800. Both parties relied on newspapers, pamphlets, sermons, and songs to influence public opinion; however, newspapers were the most effective means of swaying the voters. Although the Federalists, led by John Adams and Alexander Hamilton, had almost twice as many partisan newspapers to disseminate their propaganda, the Republicans, under the leadership of Thomas Jefferson, had a much larger number of journals that were substantially more dogmatic in their denunciations. This advantage, coupled with internal Federalist crises, enabled the Republicans to be victorious at the polls. This study proves that the campaign of 1800 was one of the most libelous and rancorous in United States history.