Bernie Sanders is replacing his state director in the critical early-voting state of South Carolina.

Sanders’ presidential campaign tells The Associated Press that Jessica Bright now heads the campaign in South Carolina. Bright had been Sanders' deputy state director and previously was political director for Democrat Joe Cunningham's upset win in South Carolina's 1st Congressional District last year.

Bright replaces Kwadjo Campbell, a former member of the Charleston City Council. The campaign provided no details on Campbell’s departure.

Sanders’ campaign co-chair Nina Turner tells The Associated Press that, "Campaigns aren't for everybody, and we wish him well."