Texas & Trump 2026: Rio Grande Valley & Competitive Districts
Texas is not a statewide battleground in 2026 — but three Rio Grande Valley congressional districts are among the most watched House races in the country, reflecting the Hispanic voter realignment that reshaped the Texas political map.
Competitive Texas Congressional Districts 2026
| District | Region | Current Rep. | 2024 Margin | Rating |
|---|---|---|---|---|
| TX-15 | McAllen / Edinburg | Monica De La Cruz (R) | R +11 | Lean R |
| TX-28 | Laredo / San Antonio | Henry Cuellar (D)* | D +5 | Toss-up |
| TX-34 | Brownsville / RGV | Vicente Gonzalez (D) | D +8 | Lean D |
*Cuellar indicted on federal bribery charges 2024; potential open seat dynamic.
The Rio Grande Valley Hispanic Shift
The Rio Grande Valley — Hidalgo, Cameron, Starr, and Webb counties — is 90%+ Hispanic and was one of the most Democratic regions in America for decades. The shift that began in 2020 represents one of the most dramatic realignments in recent political history.
Starr County (99% Hispanic): Obama +63 in 2012 → Biden +5 in 2020 → Trump +17 in 2024. A county that voted Democratic by 63 points swung 80 points in 12 years.
Key drivers: border-area residents view illegal crossings as a quality-of-life and economy polling, not a civil rights issue. Local ranchers fear fentanyl trafficking. Catholic cultural conservatism aligns more with Republican social positions. And many residents have family and economic ties to Mexico — making them sympathetic to tough border enforcement as a signal of order.
Statewide Presidential Trend
| Year | R% | D% | Margin |
|---|---|---|---|
| 2016 | 52.6% | 43.4% | R +9.0 |
| 2020 | 52.1% | 46.5% | R +5.6 |
| 2024 | 56.9% | 42.3% | R +14.6 |
2024 margin widened significantly as Trump gained among Hispanics and suburban softening was insufficient to offset rural/exurban red-shift.
Key Demographic Factors
Suburban Dallas & Houston
Collin, Denton, Fort Bend counties shifted Democratic 2016–2020 as college-educated suburban voters moved against Trump. Fort Bend (Houston suburb) went D+8 by 2020. However, in 2024 Republicans partially reversed those gains — the suburbs didn’t hold the D shift.
Travis County (Austin)
Texas’s most Democratic county at D+50+. Tech sector, UT Austin, state capitol. But Austin’s growth has spilled into adjacent Williamson and Hays counties, making those competitive. Austin-area growth is the one consistent trend expanding Texas Democratic geography.
Harris County (Houston)
Largest county, majority non-white, Biden won by ~13 points in 2020. Houston’s energy sector and diverse economy. Harris County Democrats have built strong local government control, electing DA, judges, and commissioners. Statewide, it provides the largest raw Democratic margin in Texas.