As New York City's democratic socialists swept through the June 23 primary, San Francisco's progressives watched with what one of their own called "a little bit of envy." But the gap between the two cities isn't an attitude problem. It's a structural trap three decades in the making — and the winners have every incentive to leave the system exactly as it is.

The same week Mayor Zohran Mamdani's preferred congressional slate went three-for-three in New York, SF Mayor Daniel Lurie's moderate agenda finished its June 2 primary sweep without a single loss. Two major Democratic cities, two diametrically opposed political trajectories. The reasons are concrete: income divergence, racial displacement, and an electoral structure that moderates in San Francisco built — and have no reason to dismantle.

San Francisco's Democratic Socialists chapter once looked like a viable political force. By June 2026, they were looking east with longing.

"Everybody is looking at New York with a little bit of envy," Aditya Bhumbla, a former co-chair of the SF DSA, told the SF Standard after the NYC results came in. "We want that here."

That want runs into a wall that has nothing to do with messaging or enthusiasm. Three analysts explain why the wall is structural — and likely permanent so long as today's winners hold the levers.

The income chasm

Start with the money. Over the past decade, San Francisco's median household income climbed 37.5%, landing at $150,600, according to U.S. Census data. New York City's grew 15.2% over the same period, reaching $85,980. San Francisco, in other words, is nearly twice as wealthy as New York on the median — and that gap has been widening.

"That explains a ton of it," said Daniel Anderson, a political consultant who worked on progressive congressional candidate Natalie Gee's unsuccessful June 2 campaign. "Just in terms of people's sensibilities, the things they care about, the things they don't care about. Those types of [working-class] people are not in San Francisco as much anymore." (Quotes via SF Standard.)

The consequences extend beyond ideology. The city is now whiter and less Black and Latino than New York, according to Lincoln Mitchell, a Columbia University politics professor who splits time between both cities. That demographic mix, he told the SF Standard, "is going to skew it rightward."

The displacement machine

What makes San Francisco's progressive erosion different from gentrification in other cities is geography. New York's five boroughs give displaced working-class residents somewhere to go — within the same election jurisdiction. Brooklyn to the Bronx is still New York City.

San Francisco has no such geography. When a renter gets priced out of the Mission or Bayview, they don't move to another SF neighborhood — they move to Oakland, Richmond, or Antioch. And there, Mitchell says, they effectively vanish from the electorate that shaped them.

"The difference in San Francisco is you get pushed out of the city," Mitchell told the SF Standard. "You're in Oakland, and then you're not voting anymore."

That's not a metaphor. It's a description of how a city remakes its own electorate over time — not through voter suppression, but through a housing market that prices progressive voters out of the jurisdiction.

The primary structure nobody's reforming

The third leg of the structural trap is the one most under-discussed in SF progressive post-mortems: the city's nonpartisan, open primary system.

New York City uses a closed Democratic primary. In a city where Democrats dominate registration, the Democrat who wins the primary wins the general — which means the primary is everything, and only registered Democrats decide it. That's how a democratic socialist like Mamdani becomes mayor.

San Francisco runs nonpartisan, open primaries. Any registered voter — Republican, independent, decline-to-state — can vote in every race. Mitchell put it plainly to the Standard: "Neither of these mayors would have been elected under the electoral system in the other city."

This is the mechanism. When Saikat Chakrabarti came in third in SF's congressional primary in June, his coalition looked strong on paper — young, energized, digitally organized. But the electorate he was competing in included voters who have no party loyalty to the left. "The moderate faction in the city did a better job of painting a story for why the city is currently dysfunctional," Chakrabarti acknowledged. "That's why their version is winning."

The feedback loop

The Dissent has documented across this primary season how the same tech-money network — anchored by figures like Chris Larsen, Sergey Brin, and Michael Moritz — went 100% in June, backing Lurie's preferred candidates and defeating labor-backed Prop. D, the business-tax measure. Those donors built the coalition that benefits from the open primary. They have no reason to close it.

That is the trap in full: working-class voters get displaced to the East Bay. The remaining electorate skews wealthier and whiter. The nonpartisan primary structure amplifies that shift. And the winners who benefit from the structure control the political capital that might otherwise reform it.

SF's progressives can envy New York all they want. But until they reckon with the system that's swallowing them — not just the candidates, not just the money — the envy will stay exactly that.