Two-party system
A two-party system is a party system where two major political parties dominate the government. One of the two parties typically holds a majority in the legislature and is usually referred to as the "majority" or "governing party" while the other is the "minority" or "opposition party". Around the world, the term has different senses. For example, in the United States, Jamaica, and Malta, the sense of "two-party system" describes an arrangement in which all or nearly all elected officials belong to one of the only two major parties, and third parties rarely win any seats in the legislature. In such arrangements, two-party systems are thought to result from various factors like winner-takes-all election rules. In such systems, while chances for third-party candidates winning election to major national office are remote, it is possible for groups within the larger parties, or in opposition to one or both of them, to exert influence on the two major parties. In contrast, in the United Kingdom and Australia and in other parliamentary systems and elsewhere, the term "two-party system" is sometimes used to indicate an arrangement in which two major parties dominate elections but in which there are viable third parties which do win seats in the legislature, and in which the two major parties exert proportionately greater influence than their percentage of votes would suggest.
History of conservatism in the United States
A relatively new element of conservatism is the Tea Party movement of 2009–present, a populist grassroots movement comprising over 600 local units who communally express dissatisfaction with the government and both major parties. Many units have promoted activism and protests. The stated purpose of the movement is to stop what it views as wasteful government spending, excessive taxation, and strangulation of the economy through regulatory bureaucracies. The Tea Party attracted national attention when it propelled Republican Scott Brown to a victory in the Senate election for the Massachusetts seat held by the Kennedy brothers for nearly 60 years. In 2010, Tea Party candidates upset establishment Republicans in several primaries, such as Alaska, Colorado, Delaware, Florida, Nevada, New York, South Carolina, and Utah, giving a new momentum to the conservative cause in the 2010 elections, and boosting Sarah Palin's visibility. Rasmussen and Schoen (2010) conclude that "She is the symbolic leader of the movement, and more than anyone else has helped to shape it." In the fall 2010 elections, the "New York Times" identified 129 House candidates with significant Tea Party support, as well as 9 running for the Senate; all are Republicans, as the Tea Party has not been active among Democrats.