Political parties are organizations that share common political goals and seek to get their members elected to public office to advance those goals. Most countries have a party system consisting of either one dominant party, two major parties, or multiple parties. The United States has a two-party system with the Democratic and Republican parties vying for control of the government. While the parties agree on some basic principles, they differ in their approaches to issues like the role of government and how to help citizens. [/SUMMARY]