1955 Constantinopolitan general election (The Sublime Porte)

The 1955 Constantinopolitan general election was held on September 11, 1955 after the dissolution of the Chamber of Deputies by new Prime Minister Mustafa Çetin. The election was painted as a referendum on the social reforms proposed by the new government. The election resulted in a landslide victory for the ruling National Republican Party, as the incumbent government won the largest majority in Constantinopolitan history up to that point, in terms of both popular vote and number of seats. The National Liberals won a 83-seat supermajority, allowing it to conduct its reformist program through the next four years.

Backgroud
The 1955 election was called on the day after new Prime Minister Mustafa Çetin was sworn into office. Çetin represented the Party's left wing and sought to gain popular approval for his proposed social programs. In the case of a defeat, Çetin declared that he would retire from politics. In addition to his newly found popularity, the National Republican Party profited from its fusion with the Turkish Republican Party, which had joined the NRP in 1954.

Meanwhile, the opposition was divided over the leftward shift of the National Republican Party, with the Democratic Front losing some supporters to the ruling party. The Conservative Republican Party argued for laissez-faire capitalism and social conservatism, proposing to scale back social programs and privatizing the country's infrastructures. Despite the rise of the Conservative Republican Party, the National Liberals remained consistently popular, never falling below 35% in opinion polls.

Fifth Chamber of Deputies
The fifth Chamber was the first one that ran for the full four-year term, as Mustafa Çetin remained the country's third prime minister for 1955-1959.

Throughout his first four years as prime minister, Mustafa Çetin is credited with laying the foundations of a modern welfare state. During the tenure of the fifth Chamber, the government expanded unemployment benefits, created an old age pension plan for low-income people, and introduced an eight-hour workday. These policies led to a significant rise in popularity of the government, depleting leftist parties of their support and cementing the National Republicans' role as the de facto ruling party of Constantinople.