History of the Republican Party (United States)The Republican Party, also known as the GOP (Grand Old Party), is one of the two major political parties in the United States. It is the second-oldest extant political party in the United States after its main political rival, the Democratic Party. In 1854, the Republican Party emerged to combat the expansion of slavery into American territories after the passing of the Kansas–Nebraska Act. The early Republican Party consisted of northern Protestants, factory workers, professionals, businessmen, prosperous farmers, and after the Civil War, former black slaves.
History of the Democratic Party (United States)The Democratic Party is one of the two major political parties of the United States political system and the oldest existing political party in the country. The Democratic party was founded in the 1830s and 1840s. It is also the oldest active voter-based political party in the world. The party has changed significantly during its nearly two centuries of existence. Once known as the party of the "common man," the early Democratic Party stood for individual rights and state sovereignty, and opposed banks and high tariffs.
Political realignmentA political realignment, often called a critical election, critical realignment, or realigning election, in the academic fields of political science and political history, is a set of sharp changes in party ideology, issues, party leaders, regional and demographic bases of power of political parties, and the structure or rules of the political system, such as voter eligibility or financing. The changes result in a new political power structure that lasts for decades, replacing an older dominant coalition.
United States House of RepresentativesThe United States House of Representatives is the lower chamber of the United States Congress, with the Senate being the upper chamber. Together, they comprise the national bicameral legislature of the United States. The House's composition was established by Article One of the United States Constitution. The House is composed of representatives who, pursuant to the Uniform Congressional District Act, sit in single member congressional districts allocated to each state on the basis of population as measured by the United States census, with each district having one representative, provided that each state is entitled to at least one.