The congressman conceded before most outlets even called the race.

In a surprising turn of events, businessman Zach Lahn has defeated Congressman Randy Feenstra in the Iowa GOP primary, breaking a significant endorsement streak for former President Donald Trump. Feenstra, who was backed by Trump, conceded the election before most media outlets had officially called the race, underscoring the unexpected nature of Lahn's victory.

This defeat marks the first time Trump has lost an endorsement in House, Senate, or gubernatorial races, a notable shift in the political landscape as the former president has maintained a perfect record until now.

Lahn's win positions him to face Democratic state auditor Rob Sand in the upcoming general election, raising questions about the dynamics of the Republican Party in Iowa and the influence of Trump's endorsements. The primary took place against a backdrop of early voting that began in mid-May, with Trump's endorsement coming just days before the election.

This timing may have contributed to the surprising outcome, as voters had already begun casting their ballots. The implications of Lahn's victory could resonate beyond Iowa, potentially signaling a shift in voter sentiment within the Republican base as the party prepares for the general election.