What it would take for Jeff Belle.
Vargas starts 18.4 points ahead on our starting line from recent official results. Campaign work can move about 1,036 net votes toward Belle, a 0.7-point gain. Winning outright would take a 17.7-point national wave on top of that. Here is the plan that makes Belle the one standing if one comes.
A long shot on the math: it takes a 17.7-point national wave.
79,416 votes.
That is half of the 158,830 ballots we expect in this race, plus one. Where Belle stands today, and what is missing:
Starting line: a weighted blend of the official 2022 and 2024 results in this district (President, U.S. Senate, Governor, Attorney General). No 2026 polls have been published. 2026 turnout modeled on 2022, the last midterm.
<1% today. A wave changes that.
We ran this race 20,000 times with realistic error on every assumption. Drag the slider to see the odds move as the campaign captures more of what history says is available.
Each simulation draws the starting line with an error of 7 points of margin (no 2026 polls, so the starting line comes from history and carries more error) and lets the plan over- or under-deliver by 30 percent. Seeded and reproducible; the method and data are at the bottom of the page.
The gap closes three ways.
Change minds. Bring out voters who skip midterms. Win back the third-party vote. Every pool below is counted from official precinct returns and published polls.
Who. 802 voters who split their ticket in recent elections and lean Vargas today.
How. Live conversations on the call list that matters: voters who crossed party lines, plus the undecided. Belle needs to win 50 percent of the ones now leaning Vargas.
Who. There are almost no cities and unincorporated areas Belle's side carries, so turnout alone cannot help here.
How. Voter ID calls to people who voted in 2024 and skipped 2022, then a ballot chase until each one has voted.
Who. Voters who went third party in recent races, in the cities and unincorporated areas that lean Belle's way.
How. A direct appeal to voters who went third party last time. They have already shown they will leave the two-party default.
Together: 1,036 net votes against a gap of 29,221. Still 28,185 short. The rest needs a national shift of about 17.7 points that no campaign controls.
5 cities and unincorporated areas carry 100% of it.
Ranked by the net votes each one gives the plan. The darker the county, the more of the upset lives there.
- 01+343Chula VistapersuadeStarting line Vargas +17. 0.7% split their ticket.
- 02+320San DiegopersuadeStarting line Vargas +33. 1.0% split their ticket.
- 03+204Unincorporated San Diego CountypersuadeStarting line Belle +9. 1.4% split their ticket.
- 04+135National CitypersuadeStarting line Vargas +26. 2.5% split their ticket.
- 05+33Imperial BeachpersuadeStarting line Vargas +5. 0.7% split their ticket.
The hidden path.
Chula Vista carries the most.
Chula Vista gives this plan more net votes than any other place: 343. It sits at Vargas +17 on our starting line, and 0.7 percent of its voters split their ticket in recent elections.
National City splits its ticket the most.
Of the cities and unincorporated areas in this plan, National City has the highest share of ticket splitters: 2.5 percent. That is where a persuasion call is most likely to reach someone open to crossing over.
Spend it where it counts.
As of June 30, 2026, Vargas had $164K in cash on hand to Belle's $1,364. That is exactly why the plan puts every dollar on the few places listed here instead of the whole map.
The honest math.
Every lever at its historical ceiling moves 1,036 net votes. The gap is 29,221. That is the measure of what a strong campaign adds: 0.7 points of margin, and first position if the national mood breaks.
Where voters cross over.
Every dot is a precinct. If no one split a ticket, every dot would sit on the line. The orange ones are where Belle's side lost voters it won further up the ballot.
- Precincts
- 394
- Slope
- 1.028
- R²
- 0.967
- Residual SD
- 3.4 pts
- Crossover precincts
- 58
Weighted least squares, one point per precinct, weighted by ballots cast. Orange precincts sit more than one residual standard deviation below the line: Belle's side did worse there in this race than the top of the ticket predicts. Hover any dot for the precinct.
Voting starts October 5.
- Now to October 4Find them
Voter ID calls across the persuasion list in these cities and unincorporated areas. Every conversation tags the voter: with Belle, with Vargas, or undecided. The undecided become the persuasion universe; the supporters become the ballot chase list.
- October 5 to 16Persuade
Second conversations with every undecided and soft voter, built around the one issue they named on the first call. The goal is 802 net votes from people who have crossed party lines before.
- October 17 to 26Bank the ballots
California mails a ballot to every active registered voter starting October 5. Ballots postmarked by November 3 count if they arrive by November 10, and conditional voter registration is open through Election Day. Chase every supporter's mail ballot request until it is returned, and move supporters to early voting while it is open.
- October 27 to November 2Turn them out
The drop-off voters: people who voted in 2024 and skipped 2022. At least 0 of them live where Belle is favored. Ballots postmarked by November 3 count if they arrive by November 10.
- November 3Election day
Polls and vote centers are open until 8 p.m. California allows conditional voter registration through Election Day. The last calls go to identified supporters who have not voted, with their polling place in hand.
No wishful thinking.
Official results in this district: Harris carried the 2024 presidential race by 17.6 points; Schiff carried the 2024 U.S. Senate race by 17.2 points; Newsom carried the 2022 governor's race by 20.7 points.
- Belle wins 50 percent of the ticket splitters now leaning Vargas.
- The national environment moves about 17.7 points toward Belle's side between now and November 3.
- No 2026 public poll exists for this race, so the starting line is a weighted blend of official recent results; the first real poll will move it.
246 conversations.
That is how many live voter conversations this plan takes: about 4,702 dials to 1,567 households, before the last ballot is cast.
Call list: every ticket splitter and undecided voter in the targeted places (you cannot tell which way they lean before the call), every targeted drop-off voter, and the reachable third-party voters. About 69 households for every 100 voters on the list, three attempts each, and a 5.24 percent live answer rate per attempt, the per-program average across 1.2 million real 2026 dials in our published benchmarks.
We run this list.
Calls are the voter ID and ballot chase engine of this plan. They find the persuadable voters and the supporters, so every other dollar lands on the right door. The full call program for this list is an estimated $972 at our published rates: 1,567 households, three attempts each.
Professional live callers working exactly these precincts: persuasion on the ticket splitters, voter ID on the fence, ballot chase on every absentee request until it is returned. A live dashboard shows every conversation as it happens. Days to launch, not weeks.
Who is on the ballot.
Jeff Belle (R)
A San Diego business owner who won election to the Contra Costa County Board of Education in 2014.
Cash on hand $1,364 and $25,498 raised since January 1, 2025, per FEC reports through June 30, 2026.
Juan Vargas (D)
U.S. Representative since 2013 who previously served in the California State Senate (40th district), the State Assembly (79th district) and on the San Diego City Council. Born in National City, he is one of ten children of Mexican immigrant parents.
Cash on hand $163,676 and $568,520 raised since January 1, 2025, per FEC reports through June 30, 2026.
What changed, and when.
We re-run this race as new polls, fundraising reports and early vote counts arrive. Every change to the numbers is logged here.
- September 26, 2026Underdog plan published
Starting line: Vargas +18.4. Jeff Belle needs 29,221 net votes. Odds under 1% today, 1% with the plan.
Questions
Can Jeff Belle win California's 52nd Congressional District in 2026?
Only with help from the national environment. Campaign work can move about 1,036 net votes; the gap is 29,221. The rest would take a 17.7-point national shift.
Where are the votes Jeff Belle needs?
Ranked by net votes in the plan: Chula Vista, San Diego, Unincorporated San Diego County, National City, Imperial Beach. Persuadable voters are counted from ticket splitting in 2022 and 2024 official returns; turnout targets are people who voted in 2024 and skipped 2022.
How many voters does Jeff Belle need to persuade?
About 401 voters who lean Juan Vargas today, each worth two votes of margin when they switch. That is 50 percent of the 802 persuadable voters leaning Juan Vargas.
When does early voting start in California in 2026?
California mails every active registered voter a ballot starting October 5, 2026. Ballots postmarked by November 3 count if they arrive by November 10, vote centers open before Election Day, and conditional voter registration is available through Election Day.
Who made this analysis?
The Political Group, an independent campaign services firm, from official California Secretary of State precinct returns, Census data, FEC filings and published polls. It is not affiliated with any candidate or party.
Method and sources
Precinct math from official California Secretary of State returns for 2022 and 2024, projected onto current district lines. Polls, ratings and fundraising as published on the dates shown. This is independent analysis by The Political Group, as of September 26, 2026. It is not affiliated with or endorsed by any candidate or party, and it is written for every campaign that starts behind.
Statistics: a weighted least squares crossover regression on every precinct, and 20,000 seeded Monte Carlo simulations. The baseline error (7 points of margin) and plan efficacy spread (30 percent) are our stated assumptions. Download the precinct data (CSV, ready for JASP). Free to cite under CC BY 4.0 with a link to this page.
- California Secretary of State, Statement of Vote
- California Statewide Database (precinct results and block conversions)
- Proposition 50 congressional districts (AB 604)
- FEC candidate filings (OpenFEC)
- 2026 voter contact benchmarks (The Political Group)