Texas House Races 2026: The Rio Grande Valley Battlefield

TX-28 and TX-34 presidential margins reflect Trump 2024 performance in those districts. TX-32 is an open seat after Allred vacated to run for Senate.

The Rio Grande Valley's partisan transformation is the defining story of Texas congressional politics. For most of the post-Civil Rights era, the RGV was among the most reliably Democratic regions in the country — a majority-Hispanic border region where Democratic margins routinely exceeded 60%. The transformation began visibly in 2020, when Trump dramatically improved his margins in border counties, and accelerated in 2024 when Trump won the RGV outright.

TX-15, covering the McAllen area, flipped to Republican Monica De La Cruz in 2022 after Democrats had held it for decades. De La Cruz won again in 2024, expanding her margin to nearly 5 points. TX-34, covering the coastal RGV including Brownsville and represented by Vicente Gonzalez (who moved from his old district when it became less favorable), is now a district where Trump outperformed Gonzalez's personal vote — meaning Gonzalez must substantially outrun the partisan baseline to survive. Both districts exemplify the paradox of the Hispanic working-class shift: communities that suffered the most from border-area crime and economic competition from undocumented labor have moved toward the party making the strongest case against illegal immigration.

Henry Cuellar's federal indictment is the most dramatic single-candidate story in Texas's 2026 House map. Cuellar, who has represented Laredo since 2005, was indicted in May 2024 on charges of accepting bribes from foreign governments. The charges carry severe legal consequences if he is convicted, and his case was still pending at the time of the 2024 elections — which he won, apparently, though the margin and final certified result were subject to ongoing legal and electoral complications.

Democrats face an impossible situation in TX-28. The district voted for Trump in 2024. Cuellar is among the most conservative House Democrats — he is anti-abortion, which makes him politically viable in a Catholic border community but deeply uncomfortable for the national Democratic Party. If Cuellar is convicted or forced to step down, Democrats must recruit a replacement in a district that's been drifting Republican. If Cuellar remains the incumbent, they are defending a federally charged candidate in a Trump-leaning district. Neither option is good. Republicans smell blood and are likely to invest heavily in this race.

While the RGV is moving toward Republicans, Texas's suburban growth areas around Houston and Dallas represent genuine Democratic opportunities. Fort Bend County, which contains much of TX-22, is one of the most demographically diverse suburban counties in the United States. The county is majority-minority, with large South Asian, Chinese American, Black, and Hispanic communities. It swung from solidly Republican to competitive between 2012 and 2020, and while Republicans have maintained a narrow edge, the long-term demographic trajectory favors Democrats.

TX-22 has become somewhat more Republican after redistricting adjustments, and incumbent Troy Nehls won by 8 points in 2024 — a margin that makes it challenging but not impossible for Democrats to flip in a strong national environment. TX-32 in suburban Dallas is an open seat after Colin Allred left to run for Senate. The district has a slight Democratic lean based on the 2022 and 2024 presidential results, making it one of the few Texas districts where Democrats are in a defensive rather than purely offensive position. A strong Republican candidate could flip it, while a strong Democratic candidate should hold it.

Texas's competitive House map is unusual because it includes seats moving in both directions. The RGV shift continues generating Republican opportunities in traditionally Democratic territory, while suburban growth around Houston and Dallas creates Democratic opportunities in traditionally Republican territory. The net outcome depends on which trend dominates in the 2026 cycle.

The Cuellar indictment scenario in TX-28 is the most significant Democratic vulnerability. A convicted or resigned Cuellar in a Trump-leaning district is very likely a Republican pickup. If Democrats additionally lose TX-34 and fail to flip any Republican suburban seats, Texas could be a net negative for Democrats in their effort to reclaim the House majority. Conversely, a strong national environment combined with Republican stumbles in suburban Fort Bend could produce a net neutral or slightly positive Texas outcome. The RGV is the key variable: if the Hispanic working-class shift stabilizes or partially reverses, Democrats maintain their defensive floor. If it continues in 2026, the party faces a genuinely difficult Texas map.