Sachs agreed that there was a connection between voting rules and the number of viable parties. Sachs explained how the first-past-the-post system of voting encouraged a two-party system: "The primary reason for the United States' majoritarian character is the electoral system for Congress."
In the United States, the electoral system is known as a two-party system. This means that two parties dominate politics at all different tiers of government. In the United States, these parties are the Republican Party and the Democratic Party.
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