The 2026 Republican primary cycle has been dominated by Trump’s coveted endorsement, deciding elections across the country, with a success rate rarely seen in national politics. Tuesday showed the limits of this endorsement, however, after his preferred candidates failed to win outright in two nationally visible races. Trump fared better in South Carolina, but the special Senate primary runoff was still notable as his endorsement failed to decisively swing the election. She’ll be going against Rep. Ralph Norman (R-SC) in the Aug. 25 runoff election, who won 24.6% of the vote. AdvertisementThough Tuesday showed the limits of Trump’s endorsement power, the two races were unique and fell short of indicating any message about Trump’s popularity within the Republican Party.