Two-party system
Third parties, meaning a party other than one of the two dominant parties, are possible in two-party systems, but they are often unlikely to exert much influence by gaining control of legislatures or by winning elections. While there are occasional opinions in the media expressed about the possibility of third parties emerging in the United States, for example, political insiders such as the 1980 presidential candidate John Anderson think the chances of one appearing in the early twenty-first century is remote. A report in "The Guardian" suggested that American politics has been "stuck in a two-way fight between Republicans and Democrats" since the Civil War, and that third-party runs had little meaningful success.
History of conservatism in the United States
Except briefly in the 1860s-1870s, in the United States there has never been a national political party called the Conservative Party. All major American political parties support republicanism and the basic classical liberal ideals on which the country was founded in 1776, emphasizing liberty, the pursuit of happiness, the rule of law, the consent of the governed, opposition to aristocracy, and fear of corruption, coupled with equal rights. Political divisions inside the United States often seemed minor or trivial to Europeans, where the divide between the Left and the Right led to violent polarization, starting with the French Revolution.