In 1936, New York City voters approved a landmark charter revision that introduced proportional representation for the City Council. This reform aimed to break the dominance of the Tammany Hall political machine in the United States by ensuring minority parties received legislative seats proportional to their vote share.
TLDR: During the New Deal era, New York City adopted proportional representation to dismantle the Tammany Hall monopoly. The 1936 reform allowed for a more diverse City Council by using a ranked-choice system. Although successful in increasing representation, the system was eventually repealed in 1947 during the early Cold War.
In the mid-1930s, New York City stood as the ultimate prize for political machines. Tammany Hall, the Democratic organization that had dominated city politics for decades, maintained a stranglehold on the Board of Aldermen through a winner-take-all system. Even when opposition parties garnered a significant percentage of the popular vote, the block-voting nature of the districts ensured that Tammany candidates swept nearly every seat. This lack of representation for minority parties fueled a growing movement for structural election reform during the height of the New Deal era.
The push for change culminated in 1936 with the work of the New York City Charter Revision Commission. Appointed by Mayor Fiorello La Guardia, a fierce opponent of the machine, the commission sought to modernize the city’s governance. The centerpiece of their proposal was the replacement of the Board of Aldermen with a smaller City Council elected through proportional representation. Specifically, they proposed the Single Transferable Vote system, which allowed voters to rank candidates by preference rather than selecting just one. This was intended to ensure that the legislative body reflected the actual diversity of the electorate’s political leanings.
Proponents of proportional representation argued that it was the only way to ensure a truly representative legislature. They believed that if a party received 20 percent of the citywide vote, it should hold roughly 20 percent of the seats. This was a radical departure from the existing system, where a party with 60 percent of the vote could win 100 percent of the seats. The reform aimed to empower independent voters, ethnic minorities, and smaller parties like the American Labor Party and the City Fusion Party, which had previously been shut out of power.
The 1936 referendum on the new charter saw a massive turnout, reflecting the high stakes of the municipal reorganization. Despite a vigorous and well-funded campaign by Tammany Hall to defeat the measure, New York City voters approved the charter and the proportional representation provision by a substantial margin. The first election under the new system took place in 1937, coinciding with Mayor La Guardia’s successful re-election bid. The results were transformative for the city’s political landscape. For the first time in generations, the legislative body included a diverse array of voices, including Republicans, members of the American Labor Party, and even a few insurgents who had no ties to the traditional party hierarchies.
The impact on city governance was immediate. The new City Council became a forum for genuine debate rather than a rubber stamp for the machine. Investigations into city departments became more frequent, and the transparency of the legislative process improved significantly. However, the success of proportional representation also sowed the seeds of its own destruction. The inclusion of minority voices, including members of the Communist Party during the early years of the Cold War, provided critics with the ammunition they needed to attack the system as dangerous or unstable.
Opponents of the reform, led by the established party machines, launched multiple repeal efforts over the following decade. They argued that the system was too complex for the average voter, led to legislative instability, and allowed un-American elements into the government. In 1947, amid the rising tensions of the Red Scare, voters finally approved a referendum to repeal proportional representation. New York City returned to a district-based, winner-take-all system, though the 1936 reform remains a landmark example of how structural changes can temporarily dismantle entrenched political monopolies. The experiment influenced later debates over ranked-choice voting and fair representation across the United States.

