Mark Sanford
Former South Carolina governor and congressman, certified for the 11 August 2026 Senate primary.
Certified on 28 July 2026 for South Carolina's special Senate primary, Sanford entered a day before filing closed and drew the largest reported outside spending operation in the contest within hours of doing so.
Last refreshed: 4 August 2026 · Appears in 1 active topic
Timeline for Mark Sanford
Mentioned in: Four committees put $3.39m into three weeks
US Midterms 2026Mentioned in: Nine certified, three refused, filing shut
US Midterms 2026Sanford files a day before the deadline
US Midterms 2026Background
Marshall Clement Sanford served two terms as Governor of South Carolina and later represented the state's first congressional district, a coastal seat centred on Charleston. His career has twice been interrupted and twice resumed: the state returned him to Congress after a personal scandal ended his governorship, and removed him from that seat in a 2018 primary after a presidential endorsement went to his challenger.
That 2018 defeat was among the earliest demonstrations that a presidential endorsement could unseat a sitting Republican congressman, and it was widely read at the time as settling who controlled the party's nominations.
He is best known nationally for fiscal conservatism of an unusually literal kind, having spent his House years opposing spending increases from his own party's leadership as readily as from the opposition. That record, rather than any regional base, is what a South Carolina Republican primary electorate is being asked to weigh again.
He returned as the only unencumbered candidate
Federal candidacy papers were lodged at 09:13 on 27 July 2026, naming a committee registered at a Sullivan's Island address, and the state certified him for the 11 August ballot the following day . A super PAC placed $620,000 of streaming advertising behind him the same day he filed .
His position in the field carries a structural quirk. The two sitting congressmen standing alongside him would each empty a House seat by winning, a vacancy no special election could fill before well into 2027. Holding no office, he would cost his party nothing, which makes him the only leading candidate whose victory has no legislative price attached.
