A super PAC aligned with President Donald Trump has launched an attack ad targeting Kentucky GOP Rep. Thomas Massie after his series of high-profile breaks with the administration, including opposition to a landmark policy bill and criticism of strikes against Iran.

Thomas Massie says he has the “antibodies” after surviving President Trump’s previous attempt to oust him during his first administration. The Kentucky Republican’s immunity theory is now being put to its biggest test as Trump steps up his attacks and groups aligned with the president gear up to eject Massie in his 2026 GOP primary.

Trump and Massie have been ensnarled in several public back-and-forths throughout the president's second term.