Every country has its own system of government. Political parties defined as an organization whose candidates find election to a government office. However, the party system according to Abdul Rashid Moten and Syed Serajul Islam (2011) refers to the interactions of parties with each other and with the entire political system. In general, the party system is classified based on the number of political parties and the relationship between parties in the governing process (Danziger, 1991). There are five types of party systems: two-party system, dominant-party system, one-party system, multi-party system, and two-plus-party system (refer to Figure 1 in Appendix 1). The first type of party system is the two-party system. party system. According to Danziger (1991), the main feature of the two-party system is the change in the governing power of two main political parties. The electoral organization of the country is the important factor that influences the number of parties to compete effectively (Ethrige & Handelman, 2010). Each party has the possibility of obtaining a majority in government and also of alternating power. Abdul Rashid Moten and Syed Serajul Islam (2011) also stated two essential characteristics that support Danziger's (1991) characteristic. The first essential feature of the two-party system is that only two parties share the electoral vote and control the political exercise. Second, the two major parties alternate in exercising power. In a two-party system, a third party may exist, but it has limited power; instead, a major party needs its support to obtain a majority (Rodee, Anderson, Cristo, & Greene, 1983). Unlike the multi-party system, the two-party system is more stable because one of the parties could achieve the legislative majority (Ethrige & Han...... middle of paper ......and two large parties with one or smaller parties and more relevant. For example, Germany has large Christian Democratic and Social Democratic parties, but the Free Democratic and Green parties get enough votes to make them politically important. Austria has long been dominated by the two large parties, but recently by a third strongly nationalist As long as there are at least two parties, the system is called a “competitive party system.” Even if there are only two parties, and they are not ideologically distant, the essence of a competitive system The party system continues to prevent corruption. A single party that closes itself in power, whatever its ideological logic, inevitably becomes corrupt and can only be kept under control by the "outside" party or parties that hammer the alleged corruption into the ministry of the "in" party.”..