Steyer Drops to 38% in CA Governor Primary as Democrats Split Five Ways

Tom Steyer's California Governor Odds Collapse 13 Points Even As His Polls Hold Steady

Five Democrats are cannibalizing each other's vote share in California's jungle primary, and prediction markets have decided Tom Steyer will pay the price. Republican Steve Hilton leads all candidates at 20.5% in the latest polling, while the Democratic vote is split five ways with no single Democrat cracking 19%. That arithmetic, under California's top-two primary system, could mathematically push two Republicans into the November general election, locking every Democrat out entirely.

Steyer's implied probability of advancing from the June 2 primary has fallen from 50% to 38% over the past three days, a 13-percentage-point collapse tracked across both Kalshi and Polymarket. The move is striking because Steyer's own polling hasn't deteriorated in any meaningful way. He sits at 14.1% among likely voters as of May 9, essentially flat from 15.3% a week earlier. This is not a candidate whose campaign is imploding. This is a candidate whose market is repricing the entire structure of the race around him.

The divergence between stable polls and falling odds tells a specific story: bettors aren't losing faith in Steyer. They're losing faith that any Democrat can consolidate enough support to guarantee two Democratic slots in the top two.

Live Odds: Where the California Governor Primary Market Stands Right Now

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Steyer's current pricing shows a narrow spread between platforms: 39% on Kalshi and 36% on Polymarket. That 3-point gap is within the normal range for a contested political market with active trading on both sides.

The broader context matters. Xavier Becerra leads the Democratic field at 18.0% in polls, yet even he hasn't broken away from the pack. Behind Steyer at 14.1% come Katie Porter at 8.8%, Matt Mahan at 6.8%, and Antonio Villaraigosa at 2.3%. Add in Betty Yee at 1.4%, and the cumulative Democratic vote is distributed across candidates who collectively lack individual strength to challenge Hilton's 20.5% or even Chad Bianco's 12.7% Republican share.

Eric Swalwell's withdrawal on April 12, when he held roughly 14% support according to AP News, was supposed to help consolidate the Democratic lane. Instead, his voters appear to have scattered. Becerra gained roughly 1 point between early May polls, Steyer lost a point, and Porter and Mahan each dropped. No single Democrat absorbed the Swalwell bloc, which is exactly the scenario that terrifies the market.

Steyer's Price Chart Reveals When Bettors Started Losing Confidence

The three-day window from May 10 to May 13 captures the full extent of the selloff. Steyer entered the period at 50% implied probability, a coin flip that reflected his status as a well-funded Democrat with name recognition and a credible path through the primary. He exits it at 38%, now closer to a one-in-three chance.

No single blockbuster catalyst explains the full 13-point move. The most proximate events are the early May debates, where candidates clashed on taxes, Trump, and healthcare in exchanges that highlighted Democratic divisions rather than consolidating behind any front-runner. Steyer himself faced pointed attacks over his hedge fund past, including criticism for profiting from private prisons, which may have prompted some bettors to question his ability to unify progressive voters.

Meanwhile, reporting that tech money is backing a former executive in the race signals that donor capital is fragmenting across the Democratic field rather than coalescing. When money flows to multiple candidates simultaneously, it reinforces the very vote-splitting dynamic the market is now punishing.

The honest read: this looks more like a slow structural repricing than a reaction to any single headline. Bettors appear to have collectively recalculated the math of a five-way Democratic split against a consolidated Republican vote, and Steyer, as the second-place Democrat, absorbs that risk most directly.

The Real Fear Driving Steyer's Odds Down: A Fractured Democratic Field Could Hand Both Slots to Republicans

California's top-two primary sends the two highest vote-getters to the general election regardless of party. In a state where registered Democrats outnumber Republicans by roughly two to one, this system almost always produces at least one Democrat in the final. Almost always.

The 2018 jungle primary for the 39th Congressional District demonstrated what happens when one party consolidates and the other fractures: two Republicans nearly locked Democrats out entirely. The current governor's race presents a similar setup in reverse. Hilton at 20.5% and Bianco at 12.7% give Republicans a combined 33.2% share that is distributed efficiently across just two candidates. Democrats, meanwhile, spread roughly 50% of the vote across five active candidates.

For Steyer to advance, he doesn't just need to perform well. He needs the Democratic field to thin, or he needs one Democrat (likely Becerra) to pull far enough ahead that Steyer can claim the second slot. The problem is that mail-in voting has already begun, as AP News reported, meaning early ballots are already locked in for candidates who may later fade. Every early vote cast for Porter, Mahan, or Villaraigosa is a Democratic ballot that cannot be redirected to Steyer or Becerra, even if late polls show consolidation is necessary.

This is the mechanism the market is pricing. At 38%, Steyer's implied probability says he advances roughly two out of five times. That feels about right given the math: if nothing changes structurally in the Democratic field, the risk of a Republican sweep of both top-two slots is real, not theoretical.

The Case for Steyer: Why 38% Might Be Too Low

The strongest counter-argument runs like this: California is still a deeply blue state, and Democratic turnout in a gubernatorial primary will dwarf Republican participation. Steyer has money, which matters enormously in a state this large. He has positioned himself as a tax-the-wealthy progressive, a message calibrated for Democratic primary voters. And historically, no Republican has won a statewide California race since 2006.

More concretely, the lower-tier Democrats are already fading. Porter dropped from 10.3% to 8.8% between the May 2 and May 9 polls. Mahan fell from 10.3% to 6.8%. Villaraigosa is at 2.3%. If those numbers continue to compress toward Becerra and Steyer over the final three weeks, the two-Republican nightmare scenario becomes much less likely.

Steyer also benefits from a dynamic that polls may not fully capture: strategic voting. As California voters absorb the reality that vote-splitting could elect two Republicans, some will abandon their preferred lower-tier Democrat and vote tactically for Becerra or Steyer. That behavioral shift won't appear in polls taken today but could materially alter the June 2 result.

At 38%, the market is giving Steyer credit for these possibilities without fully pricing them in. If one more minor Democrat drops out before June 2, or if late polling shows consolidation, Steyer's contract could snap back toward 50% quickly. This market resolves in just 20 days, and with mail ballots already arriving, every new data point between now and then will move prices.

The bet against Steyer is ultimately a bet that California Democrats will fail to coordinate in time. It has happened before in down-ballot races, but never in a governor's race with this much attention and this much money on the line.