Upset Brief · CA-52 · Jeff Belle (R) vs. Juan Vargas (D), incumbent

A long shot on the math: it takes a 17.7-point national wave.

<1%
odds today
1%
odds with the plan
29,221
net votes to find
37
days left; voting starts October 5
Where
  1. 01
    Chula Vista
    Starting line Vargas +17. 0.7% split their ticket.
    +343
  2. 02
    San Diego
    Starting line Vargas +33. 1.0% split their ticket.
    +320
  3. 03
    Unincorporated San Diego County
    Starting line Belle +9. 1.4% split their ticket.
    +204
  4. 04
    National City
    Starting line Vargas +26. 2.5% split their ticket.
    +135
  5. 05
    Imperial Beach
    Starting line Vargas +5. 0.7% split their ticket.
    +33

The top 5 cities and unincorporated areas carry 100% of the plan.

How
  • P
    Persuade
    802 voters who split their ticket in recent elections and lean Vargas today.
    +802
  • M
    Mobilize
    There are almost no cities and unincorporated areas Belle's side carries, so turnout alone cannot help here.
    +0
  • C
    Consolidate
    Voters who went third party in recent races, in the cities and unincorporated areas that lean Belle's way.
    +234

Plus a national shift of 17.7 points of margin (28,185 votes) that no campaign controls.

What has to be true
  1. Belle wins 50 percent of the ticket splitters now leaning Vargas.
  2. The national environment moves about 17.7 points toward Belle's side between now and November 3.
  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.
The numbers behind it
  • 01
    Crossover regression
    394 precincts, R² 0.967, 58 crossover precincts identified
  • 02
    Monte Carlo
    20,000 seeded simulated elections with a 7-point baseline error. 90% range of the final margin with the plan: -46,482 to -9,986 votes.
  • 03
    Money, FEC candidate totals through June 30
    Belle $1,364 cash on hand; Vargas $163,676.
  • 04
    Call program for this list
    1,567 households, 4,702 dials, about 246 live conversations: an estimated $972 at published rates.
For the campaign

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The full plan, the map and the live odds simulator ›All California races ranked ›

Independent analysis by The Political Group from official California Secretary of State precinct returns (2022 and 2024), FEC filings and published polls, as of September 26, 2026. Not affiliated with any candidate or party.