U.S. Representative Dan Crenshaw lost his Republican primary election Tuesday to Texas state Representative Steve Toth, ending the four-term congressman's tenure representing the state's 2nd Congressional District.

Toth, a conservative state lawmaker from Conroe, defeated the incumbent in what multiple outlets characterized as an upset victory. The win positions Toth as the likely successor to represent the deep-red congressional district, which covers parts of northeast Harris County and surrounding areas.

The primary campaign centered significantly on loyalty to former President Donald Trump. Crenshaw was notably the only House Republican incumbent in Texas seeking reelection who did not receive Trump's endorsement. Multiple sources reported that Toth's campaign emphasized Trump loyalty as a key theme.

Crenshaw, a former Navy SEAL who lost his right eye in an IED explosion in Afghanistan, first won election to Congress in 2018. He gained national prominence partly due to his military background and appearances on television programs.

The defeat reflects ongoing tensions within the Republican Party between establishment figures and Trump-aligned candidates. Toth received backing from Senator Ted Cruz during the campaign, according to reporting.

With Texas's 2nd Congressional District considered safely Republican, Toth is expected to win the general election in November and join Congress in January.