A two-party system is a political party system in which two major political parties consistently dominate the political landscape. At any point in time...

political science, a multi-party system is a political system where more than two meaningfully-distinct political parties regularly run for office and...

with the two-party system is structurally similar and has even been described as an "unusual two-round system". Although advocates hoped the two-round method...

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

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....

A dominant-party system, or one-party dominant system, is a political occurrence in which a single political party continuously dominates election results...

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...

multi-party systems may have two parties that are noticeably more competitive than the other parties. Such party systems have been called "two-party-plus"...

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...

The First Party System was the political party system in the United States between roughly 1792 and 1824. It featured two national parties competing for...