An FBI bribery inquiry reached Lindsey Graham and James Clyburn—then lost its investigators

A federal public-corruption investigation examined whether the naval contractor Navatek traded campaign contributions for congressional help obtaining research contracts, ProPublica reports. The inquiry centred on claims by former chief executive Martin Kao, who told agents that bribing officials was part of the company's business model.

Kao alleged that at a March 2020 dinner, Sen. Lindsey Graham agreed to steer a roughly $10 million contract to South Carolina and asked for a total of $100,000 for his reelection campaign. Kao also described cash-for-contract arrangements involving Democratic Rep. James Clyburn and Republican Rep. Joe Wilson. The lawmakers were not formally named as subjects, but agents were investigating their interactions with Kao and told superiors that their status could change.

Kao is a compromised witness: he pleaded guilty to campaign-finance and loan-fraud offences, is serving an 87-month sentence and sought leniency. Yet agents found that seized emails, donation records and other company material corroborated significant portions of his account. An eyewitness confirmed the Graham dinner and an envelope of checks, while denying that any explicit quid pro quo occurred. Graham's former spokesperson called the allegations false; Clyburn's office said donations never caused him to increase support for a donor's request; Wilson's office said he followed campaign-finance rules.

The unresolved part is institutional. The FBI formally made two former Navatek executives subjects of the case in early 2025. Trump administration personnel changes later removed both experienced agents, and a career prosecutor quit after the Justice Department's anti-corruption section was barred from opening new cases. The inquiry went dormant before prosecutors could test Kao's allegations.

This does not establish that the lawmakers committed bribery. It establishes that potentially corroborated allegations involving public money and campaign contributions were no longer investigated after the specialized unit was dismantled—the precise kind of case an independent public-corruption capacity exists to finish.