A two-party system is a political system where two major political parties dominate the political landscape. In such systems, these parties typically compete for power, influencing government policies and elections. Voters often align with one of the two parties, making it challenging for smaller parties to gain significant traction. In the United States, the two primary parties are the Democratic Party and the Republican Party. This system can lead to a stable government, as it simplifies the electoral process. However, it may also limit political diversity and the representation of alternative viewpoints in the political arena.