A two-party system is a political framework 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, which can lead to a stable political environment but may also limit the representation of diverse viewpoints. Countries like the United States and Canada exemplify two-party systems, where parties such as the Democratic Party and Republican Party in the U.S. play significant roles. This structure can create challenges for smaller parties, making it difficult for them to gain traction in elections.