Representative Thomas Massie's defeat in Kentucky's $19 million House primary signals Donald Trump's continued grip on the Republican Party. The libertarian incumbent lost to Trump-backed challenger Ed Gallrein in what became the most expensive House primary ever, driven purely by presidential spite rather than policy differences.

Massie's loss joins other Trump targets falling this primary season, including Senator Bill Cassidy's failure to qualify for Louisiana's runoff after voting to convict Trump in his 2021 impeachment trial. These loyalty purges extend even to state legislators who opposed Trump's redistricting efforts, sending a clear message that defiance is unacceptable at any level.

The strategy backfires for Republican electoral prospects. By forcing expensive primary battles in safe Republican districts, Trump's allies waste resources that could strengthen competitive races in swing states like Pennsylvania and Arizona. Democrats benefit from these internal GOP conflicts, facing fewer resources when they need them most in tight general election contests.

Michelle Cottle argues these loyalty tests reveal Trump's deeper agenda: hollowing out the GOP until it becomes entirely his creature. With Trump's popularity declining and only 2.5 years left in office, the party faces an existential crisis about its post-Trump identity.