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...

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

paired with the two-party system is structurally similar and is often described as a de facto two-round system. Although advocates hoped the two-round method...

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 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 two-party system mean the country has effectively used a variation on the two-round system since the 1970s, where the first round selects two major...