South Carolina state Sen. Lee Bright (R), one of Sen. Lindsey GrahamLindsey GrahamOvernight Finance: Dems seek probe of acting SEC chief | Defense hawks say they won't back short-term funding | Senate seen as start point for Trump infrastructure plan | Dems want more money for IRS Overnight Defense: Pentagon considers more troops for Afghanistan | McCain, Graham won't back short-term funding | GOP defends Trump rules of engagement McCain and Graham: We won't back short-term government funding bill MORE's (R-S.C.) primary opponents, has at least $1.4 million in debt from a failed trucking business, according to The State.

The report says he blames federal government policies for his company's failure. The disclosure of the debt on his personal finance forms could hurt the Tea Party candidate's campaign.

Graham is facing four primary opponents, all of whom are vying to force a runoff against the longtime senator. Bright has been ahead of the rest in the field, breaking double-digits in some polls, but Graham has been hovering around the 50 percent threshold he'd need to avoid a primary altogether.