The Third Party System was a period in the history of political parties in the United States from the 1850s until the 1890s, which featured profound developments...

two-party system describes an arrangement in which all or nearly all elected officials belong to either of the two major parties, and third parties rarely...

A party system is a concept in comparative political science concerning the system of government by political parties in a democratic country. The idea...

Third party, or minor party, is a term used in the United States' two-party system for political parties other than the Republican and Democratic parties...

The Fourth Party System was the political party system in the United States from about 1896 to 1932 that was dominated by the Republican Party, except the...

Second Party System was the political party system operating in the United States from about 1828 to 1852, after the First Party System ended. The system was...

or forming a coalition is sometimes called a "third-party system".[citation needed] A two-party system requires voters to align themselves in large blocks...

Constitution, which predates the party system. The two-party system is based on laws, party rules, and custom. Several third parties also operate in the U.S....

The Fifth Party System, also known as the New Deal Party System, is the era of American national politics that began with the election of Franklin D....

The Sixth Party System is the era in United States politics following the Fifth Party System. As with any periodization, opinions differ on when the Sixth...