Nate Sheets (R) defeated incumbent Sid Miller (R) in the Republican primary for Texas Commissioner of Agriculture on March 3, 2026.

President Donald Trump (R) endorsed Miller in February 2026. Gov. Greg Abbott (R) endorsed Sheets in January 2026. The Texas Tribune's Kate McGee said Abbott's endorsement was "an exceptionally rare rebuke of a fellow Republican official and Trump ally by Abbott, who has mostly stayed out of statewide elected races." Writing in the Austin American-Statesman, John Moritz said Miller was "among conservatives who sued Abbott for extending early voting periods during the COVID crisis in 2020, and he briefly considered challenging the governor in the 2022 GOP primary."

In his endorsement, Abbott said, "Texans deserve an Agriculture Commissioner who is focused on promoting Texas Agriculture, with zero tolerance for criminality," referencing Miller's hiring of Todd Smith as chief of staff in 2025. In 2024, Smith pleaded guilty to one charge of commercial bribery stemming from allegations he had solicited bribes from individuals in exchange for priority consideration of applications for hemp licenses. In an interview with CBS News Texas, Miller said, "What happened to Todd Smith has happened to numerous Republicans. Keep in mind, this is Travis County, the most liberal DA's office probably in the nation...they came after Todd Smith for this very purpose to get headlines for the election, so they could defeat me."

Sheets was, as of the 2026 election, a businessman and the founder of Nature Nate's honey. Sheets said he was "a producer, a businessman, and a father who believes Texas needs new leadership rooted in real-world experience and eternal values." Sheets said he was running because he "knows firsthand the challenges that Texas ranchers face — from water access and soil health to labor shortages and government overreach." Gun Owners of America and former U.S. Sen. Rick Santorum (R-Penn.) endorsed Sheets.