California Election Odds — 2026 Live Betting Odds & Voting History

The largest state in the country is also the most active prediction-market battleground of 2026, and not for the reasons you might expect. California will not change hands in the November general election — it gave Kamala Harris a 20-point win in 2024 and has been reliably Democratic at the federal level since 1992. The story is the June 2, 2026 top-two primary, where 61 candidates are running for governor in a wide-open race to succeed term-limited Gavin Newsom, and where the fragmented Democratic field has created a credible scenario in which two Republicans advance to the November ballot in the most Democratic state in the country. Polymarket has tracked nearly $20 million in volume on California gubernatorial markets, more than any other state's gubernatorial market this cycle. The June 2 primary is three weeks away as of this writing, ballots are already in mailboxes, and no candidate has broken 20% in any reliable poll. National 2028 markets and balance-of-power coverage live on the homepage.

California governor betting odds

The Democratic field collapsed in April 2026 when former Representative Eric Swalwell, then a co-frontrunner, exited the race after multiple credible allegations of sexual assault from women who came forward over a compressed period. He suspended his campaign on April 12, announced his intention to resign from Congress on April 13, and formally left office on April 14. His departure scrambled what had been a settled top tier of Democratic candidates and re-opened a fight for the Democratic lane on June 2.

The most recent Emerson College poll (April 14-15, 2026) shows Steve Hilton (R) at 17%, Chad Bianco (R) at 14%, Tom Steyer (D) at 14%, Xavier Becerra (D) at 10%, and Katie Porter (D) at 10%, with San Jose Mayor Matt Mahan at 5% and 23% of voters still undecided. With four credible Democrats splitting the Democratic vote roughly evenly, the math points to a real possibility that the two Republicans — Hilton and Bianco — advance to the November general election. The California Democratic Party has openly urged its lower-tier candidates to drop out before the primary to consolidate the field. None have.

Tom Steyer is the wealthiest candidate in the race and has spent more than $132 million of his own money on the campaign. He has the endorsement of Our Revolution, the Bernie Sanders-affiliated group, and is running on raising corporate taxes and challenging the state's investor-owned utilities. Xavier Becerra, the former Secretary of Health and Human Services and former California attorney general, has gained ground since Swalwell's exit and led the most recent polling among Democrats specifically. Katie Porter, the law professor and former representative from Orange County, has stalled — her campaign has been dogged by viral videos critics describe as showing temperament issues, and her recent comments criticizing California's agricultural overtime law caused a brief crisis with the state's largest labor federation.

Steve Hilton, the Republican leader, has Trump's endorsement and is running as a more traditional conservative who hopes to appeal to moderate Democrats. Chad Bianco, the Riverside County Sheriff, is positioned further right and has made waves by seizing tens of thousands of ballots from the November 2025 election in keeping with broader concerns about election integrity. The two Republicans are dividing the GOP vote roughly evenly, but together they have enough support to make a Republican-Republican general election a realistic outcome.

Republicans have not won a statewide race in California since 2006.

California presidential election betting odds

California's 54 electoral votes have gone Democratic in every presidential election since 1992. Harris won the state by 20 points in 2024, a smaller margin than Biden's 29-point win in 2020 but still the largest contribution any state made to her electoral college total. The decline from 29 points to 20 was driven by a roughly 10% drop in turnout from 2020 to 2024, with Los Angeles County alone losing 14% of its turnout — a story that Democratic operatives in the state have spent the past 18 months trying to understand and reverse.

For 2028, California's significance to the prediction markets is less about which way it will go and more about which Californian carries the Democratic nomination. Gavin Newsom is a serious 2028 contender, and his term-limited departure from the governor's mansion in January 2027 sets him up for a national run. Senator Adam Schiff, sworn in in December 2024 after winning his first Senate election, is also occasionally mentioned in long-shot markets. Former Vice President Kamala Harris, a California native and former state attorney general and senator, remains in the 2028 frontrunner conversation despite her 2024 loss.

The markets pricing all of these candidates pull from California's underlying political base, and movement on California-specific issues — Proposition 50, the governor's primary outcome, the state's housing and crime numbers — can affect those national markets in ways that other state-level developments don't.

California senate betting odds

Neither of California's U.S. Senate seats is up in 2026. Alex Padilla, who was appointed to fill Kamala Harris's seat in January 2021 and then elected to a full term in 2022, is next on the ballot in 2028. Adam Schiff, who won the special and general elections in 2024 to fill Dianne Feinstein's seat, is next up in 2030.

For betting markets, this means California Senate activity in 2026 is limited to the 2028 horizon — early speculation on whether Padilla will face a serious primary challenge from his left, whether he might run for governor or president instead of seeking re-election, and whether the political environment in 2028 will be more or less favorable to incumbent Democratic senators than the current cycle. None of these markets has produced significant trading volume yet, but they tend to activate after the November 2026 results clarify the national landscape.

California house betting odds

California's congressional delegation will be elected in 2026 under new district lines drawn after Proposition 50 passed with 64% support in a special statewide election on November 4, 2025. Prop 50 temporarily suspended the powers of the California Citizens Redistricting Commission, a body created by voters in 2010 to take partisan politics out of mapmaking, and authorized the state legislature to draw new congressional maps through 2030. Governor Newsom and Democratic leaders framed the measure as the "Election Rigging Response Act," explicitly a counter to mid-decade Republican redistricting in Texas, Missouri, and now Florida.

The new map redraws several California districts to incorporate larger shares of urban and suburban Democratic voters, converting up to five Republican-leaning seats into Democratic-leaning ones. Republicans currently hold nine California House seats. The map went into legal challenge immediately after passage. A three-judge federal panel upheld the map 2-1 in January 2026, and the U.S. Supreme Court declined to hear the appeal, exhausting Republican legal options against the map itself. The new lines are in effect for the 2026 primary on June 2 and the general election on November 3.

Prediction markets are pricing California's House outcomes on two layers: which specific incumbents will win or lose their newly-drawn districts, and whether the Democrats can convert the map's structural advantage into the four or five seat pickups it was designed to produce. A separate market tracks the special election in CA-1, the seat that opened when Republican Doug LaMalfa died — that election uses the old district boundaries and runs on the same June 2 primary date.

There is also a separate California-specific layer worth tracking: ballot measures filed by Republican activists seeking to undo Prop 50 in future cycles, and a parallel constitutional amendment from former GOP gubernatorial candidate Carl DeMaio that would bar state lawmakers who voted for Prop 50 from running for office for ten years. Neither has qualified for the ballot yet, but both are generating speculative market activity.