US media outlets project that Lindsey Graham's sister, Darline Graham, will advance to the August runoff for the Republican US Senate nomination in South Carolina.

South Carolina Republicans are set to head to the polls Tuesday to select a nominee for November's election to replace the late Sen. Lindsey Graham.

Darline Graham faces a competitive GOP primary in South Carolina. Graham's chances at 59.5% YES.

South Carolina votes on Darline Graham Nordone as GOP Senate nominee. Nordone's nomination at 72% YES.