Tuesday’s special GOP primary to replace the late Sen. Lindsey Graham on the November ballot is likely heading to a runoff, despite Trump’s endorsement and his popularity with the base.Rep. Ralph Norman and Sen. Darline Graham are likely to enter a GOP runoff, sources say.USA Today Network; Getty ImagesAug. 9, 2026, 5:00 AM EDTWASHINGTON — Just days after Sen. Lindsey Graham’s sudden death, President Donald Trump threw his support behind the powerful Republican’s sister, Darline Graham, to run for a full six-year Senate term.Just a moment.We are getting your experience ready.