Mark Teixeira secured the Republican nomination for Texas’s 21st congressional district in the March 2026 primary with 60.9 percent of the vote in a crowded field, aided by an endorsement from President Trump and strong support from party leaders. The open seat, previously held by Chip Roy, sits in a district that leans heavily Republican after recent redistricting, with a Cook PVI around R+10 and consistent GOP performance in presidential and statewide races. Teixeira’s name recognition as a former MLB All-Star and substantial fundraising edge have reinforced his position heading into the November 3 general election against Democrat Kristin Hook, who won her primary but faces structural headwinds in the solidly Republican territory. Forecasters rate the contest Safe or Solid Republican. While late developments such as scandals or turnout surprises could theoretically narrow the gap, the district’s partisan composition and Teixeira’s resources make a Democratic victory unlikely based on current indicators.