Ruling party in the context of "Democratic Progressive Party"

The Party of Labour of Albania (Albanian: Partia e Punës e Shqipërisë, PPSh), was the ruling and sole legal party of Albania during the communist period (1945–1991). It was founded on 8 November 1941 as the Communist Party of Albania (Partia Komuniste e Shqipërisë, PKSh) but changed its name in 1948 following a recommendation by Joseph Stalin, who considered the name more appropriate since the majority of the party's membership was made up of the peasantry instead of the proletariat. The party was dissolved on 13 June 1991 and succeeded by the Socialist Party of Albania and the new Communist Party of Albania. For most of its existence, the party was dominated by its First Secretary, Enver Hoxha, who was also the de facto leader of Albania from 1944 until his death in 1985.

The leading role of the party is a constitutional principle of communist states. It holds that the ruling party leads the state by virtue of being the vanguard of the proletariat, a communist party.

The Albanian People's Army (Albanian: Ushtria Popullore Shqiptare, UPSh) was the national army of the People's Socialist Republic of Albania from 1946 to 1990. Like the militaries of other Communist states, the UPSh was subjected to the nation's ruling party, in this case the Party of Labour of Albania. In fact, as in other Communist states, the Party considered the military to be a creation of the Party itself. The UPSh consisted of the Ground Forces, the Navy and the Air Force. The militia of the UPSh was the Voluntary Forces of Popular Self-Defense (FVVP), and affiliate military structures included the Armed School Youth (RSHA) and Civil Defense of the Republic (MCR). After the fall of communism in Albania, the UPSh was replaced by the Albanian Armed Forces.

A dominant-party system, or one-party dominant system, is a political occurrence in which a single political party continuously dominates election results over running opposition groups or parties. Any ruling party staying in power for more than one consecutive term may be considered a dominant party (also referred to as a predominant or hegemonic party). Some dominant parties were called the natural governing party, given their length of time in power.

Dominant parties, and their domination of a state, develop out of one-sided electoral and party constellations within a multi-party system (particularly under presidential systems of governance), and as such differ from states under a one-party system, which are intricately organized around a specific party. Sometimes the term "de facto one-party state" is used to describe dominant-party systems which, unlike a one-party system, allows (at least nominally) democratic multiparty elections, but the existing practices or balance of political power effectively prevent the opposition from winning power, thus resembling a one-party state. Dominant-party systems differ from the political dynamics of other dominant multi-party constellations such as consociationalism, grand coalitions and two-party systems, which are characterized and sustained by narrow or balanced competition and cooperation.

A majority government is a government by one or more governing parties that hold an absolute majority of seats in a legislature. Such a government can consist of one party that holds a majority on its own, or be a coalition government of multiple parties. This is as opposed to a minority government, where the government does not have a majority, and needs to cooperate with opposition parties to get legislation passed. A government majority determines the balance of power. A government is not a majority government if it only has a majority when counting parties outside the government that have a confidence agreement with it.

A majority government is usually assured of having its legislation passed and rarely if ever, has to fear being defeated in parliament, a state also known as a working majority. In contrast, a minority government must constantly bargain for support from other parties in order to pass legislation and avoid being defeated on motions of no confidence. Single-party majority governments tend to be formed in the aftermath of strong election performances.

The Socialist Party of Serbia (Serbian: Социјалистичка партија Србије, romanized: Socijalistička partija Srbije, abbr. SPS) is a social democratic and populist political party in Serbia. Ivica Dačić, the former prime minister of Serbia, has led SPS as its president since 2006.

SPS was founded in 1990 as a merger of the League of Communists of Serbia and Socialist Alliance of Working People of Yugoslavia with Slobodan Milošević as its first president. In the 1990 general elections, SPS became the ruling party of Serbia while Milošević was elected president of Serbia. During Milošević's rule, SPS relied on the Serbian Radical Party (SRS) from 1992 to 1993 while it later led several coalition governments with SRS, New Democracy, and Yugoslav Left. Mass protests against SPS were held in 1991, and after being accused of falsifying votes in major urban cities, such as Belgrade and Niš, 1996–1997 protests were also organised. The Democratic Opposition of Serbia coalition defeated SPS in the 2000 general elections but Milošević declined to accept the results. This resulted in Milošević's overthrow.

The League of Communists of Serbia (Serbian: Савез комуниста Србије, romanized: Savez komunista Srbije, abbr. SKS), known as the Communist Party of Serbia (Serbian: Комунистичка партија Србије, romanized: Komunistička partija Srbije, abbr. KPS) until 1952, was the ruling political party of Serbia from 1945 to 1990. It was the Serbian branch of the League of Communists of Yugoslavia, known until 1952 as the Communist Party of Yugoslavia. The two autonomous provinces within Serbia had their own branches of the federal party: the League of Communists of Kosovo and the League of Communists of Vojvodina.

The republic-level branches of Kosovo and Vojvodina were associated with the League of Communists of Serbia as its "integral parts". Under the 1974 Yugoslav Constitution, greater power was devolved to these republic-level branches. Following the 8th Session of the Central Committee of the League of Communists of Serbia in 1987, the party was taken over by the populist faction led by Slobodan Milošević. Milošević appeased nationalists in Serbia by promising to reduce the level of autonomy within the autonomous provinces of Kosovo and Vojvodina. This policy increased ethnic tensions with the other republics and nationalities and led to the Yugoslav Wars. During the early 1990s, the growing ethnic tensions between the republics of Yugoslavia led to the break-up of the federal party.

The Communist Party of Vietnam (CPV) is the sole legal party of Vietnam. Founded in 1930 by Ho Chi Minh, the CPV became the ruling party of North Vietnam in 1954 after the First Indochina War and all of Vietnam in 1975 after the Vietnam War. Although it nominally exists alongside the Vietnamese Fatherland Front, it maintains a unitary government and has centralized control over the state, military, and media. The supremacy of the CPV is guaranteed by Article 4 of the national constitution. The Vietnamese public generally refer to the CPV as simply "the Party" (Đảng) or "our Party" (Đảng ta).

The CPV is organized on the basis of democratic centralism, a principle conceived by Russian Marxist revolutionary Vladimir Lenin. The highest institution of the CPV is the party's National Congress, which elects the Central Committee. The Central Committee is the supreme organ on party affairs in between party congresses. After a party congress, the Central Committee elects the Politburo and Secretariat, and appoints the General Secretary, the highest party office. In between sessions of the Central Committee, the Politburo is the supreme organ on party affairs. However, it can only implement decisions based on the policies which have been approved in advance by either the Central Committee or the party's National Congress. As of 2017, the 12th Politburo has 19 members.