A citizen is someone who gives loyalty to their government in exchange for protection. Loyalty means obeying laws, paying taxes, and assisting in national defense. Citizens are also expected to participate in their republic by voting and engaging in political discourse. Citizens have certain rights guaranteed by the constitution, though some rights can be revoked if a citizen is convicted of a crime through a fair trial process. The United States has a two-party system, with citizens typically aligning with either the Democratic or Republican party when participating in the political process and elections.