Independent voters are closely split between the two candidates, with Harrison currently holding a slender advantage (43% to 39%). The poll also suggests that Republicans (10%) and Independents (13%) are more unsure than Democrats (3%) about who they will vote for in November’s contest.

The YouGov News/YouGov poll also shows that Donald Trump has a big advantage in the presidential contest in South Carolina, leading Joe Biden 52% to 42%. As with Graham, Trump is doing better with men than his rival (59% to 36%) but they share equal support among women (47% each).