Nancy Mace used her Thursday podcast to attack fellow South Carolina Republican Darline Graham after Graham said in a Senate debate that national security was "not my thing."
Graham made the remark when asked whether Taiwan and the South China Sea were U.S. national security issues, saying she was "not that informed" but supported the military.
Mace said the answer was disqualifying for a Senate candidate, comparing it to "applying to be a lifeguard and saying water isn't your thing" and lamenting that she was not in the race.
She also tied the debate comment to Graham's Fox Carolina remarks on Iran, where Graham said she would trust President Donald Trump and his generals on sending troops.
Graham, appointed last month to replace her late brother Lindsey Graham and now running for a full term, has already won Trump's endorsement.