South Carolina Republicans head to the polls Tuesday in a closely watched U.S. Senate primary that has taken on national significance as Republicans seek to protect their majority in the Senate ahead of the 2026 midterm elections.
Incumbent Sen. Lindsey Graham enters the final stretch of the race with the endorsement of President Donald Trump and support from much of the state’s Republican establishment.
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His challenger, businessman Mark Lynch, has spent recent days responding to a growing list of allegations involving his finances, criminal history and campaign operations.
The latest controversy stems from an exclusive report by the Washington Reporter, which alleged that Lynch’s most recent Senate financial disclosures show he has not yet paid between $50,000 and $100,000 in federal taxes for the 2025 tax year.
The report also alleged that Lynch failed to disclose bank accounts, investments or other financial holdings that could explain roughly $5 million in personal contributions he has made to his Senate campaign.
According to the publication, an ethics complaint has been filed urging the Senate Ethics Committee to investigate both Lynch’s financial disclosures and the source of his campaign funding.
The financial questions are only the latest issue facing Lynch’s campaign.
Lynch has previously acknowledged a 1984 felony cocaine trafficking conviction, which he has described as part of a personal journey involving addiction, rehabilitation and redemption.
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He has also claimed that he later received a presidential pardon.
However, recent reports have raised questions about that claim.
According to the Washington Reporter, searches of publicly available Justice Department pardon records have failed to uncover documentation confirming that a presidential pardon was granted to Lynch.
Reports have also indicated that Lynch recently acknowledged that neither he nor his attorney have been able to locate records supporting the claim.
Additional scrutiny has focused on a 1985 South Carolina case involving allegations that Lynch left the scene of an accident involving injuries.
Lynch has denied that the incident constituted a hit-and-run.
According to State of the Day, court records indicate the original indictment was ultimately resolved after Lynch pleaded guilty to other charges.
Lynch has also faced criticism over past comments supporting the legalization of cocaine, remarks he later argued were taken out of context.
Questions have additionally been raised about staffing decisions made during his campaign, with critics arguing they reflected poor judgment.
Graham and his allies have worked to make Lynch’s background a central issue in the race.
The senator recently released an advertisement highlighting Lynch’s difficulty answering basic constitutional questions during a recorded interview.
Trump has also weighed in forcefully on the contest.
The president endorsed Graham and sharply criticized Lynch, calling him a “LUNATIC” and warning that he would be a “DISASTER for the Republican Party.”
Over the weekend, however, Lynch received a high-profile endorsement from former Rep. Marjorie Taylor Greene.
“I am done watching Lindsey Graham sell out America,” Greene wrote on X.
Abby Zilch, a spokesperson for Graham’s campaign, framed the race as a battle between Republicans aligned with Trump and factions she described as opposing the president’s agenda.
“Senator Graham believes that South Carolina is Trump country, not MTG/Massie country,” Zilch said.
She added that Graham is proud to have the support of Trump, Sen. Tim Scott and what she described as legions of pro-Trump Republicans throughout the state.
Polls indicate Graham maintains a sizable advantage heading into Election Day.
However, under South Carolina election rules, Graham must secure more than 50 percent of the vote to avoid a runoff election.
With voting set to begin in just days, the race has become increasingly focused on Lynch’s personal and financial controversies as Graham seeks to secure renomination outright and avoid an extended primary battle, Newsmax reported.
Whether the latest allegations ultimately sway Republican voters remains to be seen, but they have added fresh uncertainty to one of the most closely watched Senate primaries in the country.
This article may contain commentary which reflects the author’s opinion.
