Upset Brief · TX-20 · Edgardo Rafael Baez (R) vs. Joaquin Castro (D), incumbent
A long shot on the math: it takes a 32.8-point national wave.
0%
odds today
0%
odds with the plan
56,424
net votes to find
37
days left; voting starts October 19
Where
- 01+41Precinct 1111 (Bexar County)Starting line Castro +25. 4.5% split their ticket.
- 02+40Precinct 2068 (Bexar County)Starting line Castro +15. 3.2% split their ticket.
- 03+36Precinct 2020 (Bexar County)Starting line Castro +50. 6.0% split their ticket.
- 04+34Precinct 4076 (Bexar County)Starting line Castro +26. 4.5% split their ticket.
- 05+34Precinct 2088 (Bexar County)Starting line Castro +25. 3.2% split their ticket.
- 06+31Precinct 1110 (Bexar County)Starting line Castro +19. 4.7% split their ticket.
The top 12 precincts carry 11% of the plan.
How
- P+3,038Persuade3,038 voters who split their ticket in recent elections and lean Castro today.
- M+6MobilizeAt least 56 people who voted in 2024 but not in 2022, in precincts where Baez's side wins at least 55 percent.
- C+434ConsolidateVoters who went third party in recent races, in the precincts that lean Baez's way.
Plus a national shift of 32.8 points of margin (52,946 votes) that no campaign controls.
What has to be true
- Baez wins 50 percent of the ticket splitters now leaning Castro.
- The national environment moves about 32.8 points toward Baez'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.
The numbers behind it
- 01Crossover regression282 precincts, R² 0.958, 59 crossover precincts identified
- 02Monte Carlo20,000 seeded simulated elections with a 7-point baseline error. 90% range of the final margin with the plan: -71,529 to -33,996 votes.
- 03Money, FEC candidate totals through June 30Baez $21,462 cash on hand; Castro $154,380.
- 04Call program for this list5,086 households, 15,259 dials, about 800 live conversations: an estimated $2,649 at published rates.
Independent analysis by The Political Group from official Texas 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.