The highly contested Republican primary in Kentucky's 4th Congressional District between incumbent Representative Thomas Massie and Trump-endorsed challenger Ed Gallrein drove elevated voter engagement, resulting in total turnout of approximately 105,000 ballots. National attention, substantial outside spending, and the race's status as one of the most expensive House primaries on record mobilized participation well above prior cycles, such as the roughly 52,000 votes cast in the 2024 primary. Official results confirmed Gallrein securing the nomination with about 55 percent, consistent with trader expectations for the 100-110k range. Scenarios that could have altered this outcome included significantly lower mobilization in rural counties or unexpected shifts in early and absentee voting patterns.