The Campaign Against Mamdani Has Echoes of the Panic Around Another Socialist Democrat

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This has already happened: an upset victory of a democratic socialist during an important primary election after an extraordinary basic campaign.

In the summer of 1934, Upton Sinclair obtained the type of titles that hosted the main victory of Zohran Mamdani on June 24, 2025, during the election of the mayor of New York.

Mamdani’s victory surprised almost everyone. Not only because he beat the former governor strongly favored Andrew Cuomo, but because he did it with a great margin. Because he did it with a unique coalition, and because his Muslim identity and belonging to the Democratic Socialists of America should, in conventional political thought, make victory impossible.

It seems familiar, at least for historians like me. Upton Sinclair, the famous author and socialist during most of his life, presented himself to the post of governor in California in 1934 and won the primary democratic elections with a radical plan which he called final poverty in California, or Epic.

The news traveled the globe and triggered intense speculation about the future of California, where Sinclair was then to win the general elections. His main victory also generated theories about the future of the Democratic Party, where this turning point towards radicalism could complicate the policies of the democratic administration of Franklin D. Roosevelt.

What happened can then concern Mamdani supporters. The commercial and media elites have set up a fear campaign that has put Sinclair on the defensive. Meanwhile, conservative democrats defected and a third candidate shared progressive votes.

During the November elections, Sinclair lost decisively against the outgoing governor Frank Merriam, who would have been less lucky against a conventional democrat.

As a historian of American radicalism, I wrote a lot about the epic movement of Sinclair, and I direct an online project which includes detailed accounts of the campaign and copies of campaign documents.

Upton’s campaign in 1934 launched the out -of -sight influence of radicals in the Democratic Party and illustrates part of the potential dynamics of this relationship, which, almost 100 years later, can be relevant to Mamdani in the coming months.

California, 1934

Sinclair launched his governor campaign at the end of 1933, hoping to make a difference but not expect to win. California has remained embedded in the great depression. The unemployment rate had been estimated at 29% when Roosevelt took office in March and had only improved slightly since then.

The Sinclair Socialist Party failed badly during the 1932 presidential election when the Democrat Roosevelt pushed the victory. These bad results included California, where the Democratic Party had been afterwards for more than three decades.

Sinclair decided that it was time to see what could be accomplished by radicals working within this party.

Religating as a democrat, he got rid of a 64 -page brochure with the futuristic title I, the Governor of California and how I finished poverty. He detailed his plan to resolve the massive unemployment crisis of California by ensuring that the State takes over from farms and inactive factories and to transform them into cooperatives dedicated to “production for use” instead of “for -profit production”.

Sinclair quickly found itself by presiding over an explosive popular campaign, because thousands of state volunteers set up epic clubs – more than 800 in electoral time – and sold the new weekly epic to collect campaign funds.

The traditional democrats waited for too long to worry about Sinclair, then failed to unite behind another candidate. But that wouldn’t have been of any importance. Sinclair celebrated a massive primary victory, earning more votes than all his combined opponents.

Newspapers around the world have told the story.

“What is the problem with California?” The Boston Globe asked, according to author Greg Mitchell. “It is the most distant change to the left ever made by the voters of a large party in this country.”

Fear of construction

The primaries are one thing. But in 1934, the general elections of November turned in a different direction.

Terrified by the Sinclair plan, business leaders mobilized to defeat Epic, forming the type of transversal coalition which is rare in America, except when the radicals represent an electoral threat. Sinclair described the effort in a book he wrote shortly after the November elections: “Me, candidate for the governor: and how I was licked.”

Almost all the major state newspapers, including the five Hearst-Leaning newspapers, joined the effort to arrest Sinclair. Meanwhile, a high price advertising agency has created bipartite groups with names like California League against Sinclairism and Democrats for Merriam, deceiving the names of eminent democrats who refused to support Sinclair.

Few people of any party were enthusiastic about Merriam, who had recently angry many Californians by sending the National Guard to break a longshore strike in San Francisco, to trigger a general strike that closed the city.

The campaign against Sinclair attacked him with display panels, radio and news programming, and implacable newspaper stories about his radical past and his so-called dangerous plans for California.

Epic was faced with another challenge, candidate Raymond Haight, broadcasting on the progressive party label. Haight threatened to divide the left -wing voters.

Sinclair tried to defend himself, energetically denouncing what he called “the Lies factory” and offering revised and more moderate versions of certain elements of the epic plan. But the Red Scare campaign worked. Merriam easily exceeded Sinclair, winning by a plurality in the race for three.

New York, 2025

Will a democratic socialist present to the mayor in New York be confronted with something similar in the coming months?

A movement to stop Mamdani gathers, and part of what they say resonates with the 1934 campaign to arrest Sinclair.

The newspaper Guardian quoted “the billionaire coverage launcher Loquace Bill Ackman, who said that he and other members of the financial industry are ready to commit” hundreds of millions of dollars “in an opposing campaign.”

In 1934, the newspapers published threats from large companies, the most famous Hollywood Studios, to leave California in the event of the victory of Sinclair. The Wall Street Journal, Fortune magazine and other media have recently warned of similar threats.

And there can be something similar in political dynamics.

Sinclair’s opponents could only offer one alternative candidate. Merriam had few friends and many criticisms.

In 2025, the mayor of New York, Eric Adams, who abandoned the primary when he presented himself as a democrat and now presented himself as independent, is undoubtedly even lower, having been rescued by President Donald Trump of an act of accusation of corruption which could have done so in prison. If it is the best hope of arresting Mamdani, the campaign strategy will probably be parallel in 1934. All attacks – little efforts to promote Adams.

But there is an important difference in the way the New York competition is set up. Andrew Cuomo remains on the ballot as an independent, and his name could attract votes that could otherwise go to Adams.

Curtis Sliwa, the Republican candidate, will also be on the ballot. While in 1934, two candidates divided progressive votes, in 2025, three candidates will divide the Stop-Mamdani votes.

Religion is also looming in the upcoming countryside. The American Muslim population of the New York metropolitan region would be at least 600,000, compared to around 1.6 million Jewish residents. Adams has announced that the threat of anti -Semitism will be the main theme of his campaign.

The Stop-Sinclair campaign has also relied on religion, focusing on his professed atheism and drawing quotes from books he had written denouncing organized religion. However, a statistical analysis of the demographic voting data suggests that this effort has proven to be unimportant.

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