Incumbent Sen. Lindsey Graham won South Carolina’s Republican primary for U.S. Senate on Tuesday, defeating businessman Mark Lynch in a race that drew national attention ahead of the 2026 midterm elections.
Graham, 70, entered the final stretch with endorsements from President Donald Trump and much of the state’s Republican establishment. The race centered on Lynch’s background, including financial discrepancies and past legal issues that became central to the campaign narrative.
What Happened
South Carolina Republican voters went to the polls Tuesday for the closely watched primary. Graham was declared the winner shortly after polls closed, securing the GOP nomination in the solidly red state.
Lynch, who spent recent weeks addressing mounting allegations, faced scrutiny over his financial disclosures. The Washington Reporter reported that Lynch had not paid between $50,000 and $100,000 in federal taxes for the 2025 tax year, according to Senate financial filings.
The publication also alleged that Lynch failed to disclose bank accounts and investments that could explain roughly $5 million in personal campaign contributions. An ethics complaint was filed urging the Senate Ethics Committee to investigate Lynch’s financial disclosures and campaign funding sources.
Lynch’s Legal and Personal Background
Lynch previously acknowledged a 1984 felony cocaine trafficking conviction, describing it as part of a journey involving addiction and rehabilitation. He claimed to have received a presidential pardon, though Justice Department records searches have not confirmed such a pardon.
Additional scrutiny focused on a 1985 South Carolina case involving allegations that Lynch left the scene of an accident with injuries. Lynch denied the hit-and-run characterization, and court records show he resolved the indictment by pleading guilty to other charges.
Lynch also faced criticism for past comments supporting cocaine legalization, which he later argued were taken out of context. Questions arose about campaign staffing decisions and his performance answering constitutional questions in a recorded interview.
The Campaign Battle
Graham and his allies made Lynch’s background a central campaign issue. Trump strongly backed Graham, calling Lynch a