(Patrick Semansky | AP file photo) In this Feb. 28 photo, Sen. Lindsey Graham, R-S.C., left, stands onstage with President Donald Trump during a campaign rally, in North Charleston, S.C. Perhaps the most highly anticipated election contest coming up in South Carolina is Graham’s pursuit of a fourth term in office. A general election matchup with Democrat Jaime Harrison all but certain, Graham has also drawn a handful of Republican challengers, as well as Constitution and Libertarian party opponents.