For Republicans, a contest to replace the late Sen. Lindsey Graham pitted his sister, Darline Graham, against far more experienced candidates. But she also had the endorsement of President Donald Trump, and she secured a spot in a runoff election later this month. Family name + Trump nod = runoff spot for Graham in South CarolinaDarline Graham advanced to a runoff Tuesday night in the primary for her brother’s seat. Trump then endorsed her in the GOP primary to occupy the seat for the next six years. Both candidates will need to consolidate votes from the other challengers to win.