Charleston, South Carolina (CNN) - A supporter of Gresham Barrett emailed Republican activists in South Carolina on Friday questioning whether Nikki Haley, Barrett's opponent in the GOP gubernatorial runoff, is being straightforward about her religious beliefs.
Haley was raised Sikh but became a Methodist at the age of 24.
The email, circulated by Pickens County GOP chairman Phillip Bowers, was provided to CNN by a Haley supporter.
Pickens County is in the heart of the South Carolina upstate, where most of the state's evangelical population resides. Barrett also hails from the region and is relying on heavy turnout from his home base in the June 22 runoff.
Bowers provided links to two articles about Haley's religious background, and noted: "There seems to be something strange going on here."
"Haley can't seem to make up her mind about her faith," wrote Bowers, who is Barrett's Pickens County campaign chairman.
One of the articles he linked to – a piece from the Christian Broadcasting Network – examined why Haley has appeared to downplay her Sikh heritage in the governor's race.
"Haley can't seem to make up her mind about her faith," Bowers wrote. "There are lots of contradictions to her story. It's not my place to question her faith, but I do question her honesty. If anyone finds the truth, please let me know."
He concluded: "Again, I'm not questioning her faith, but I absolutely can't stand a liar."
The Barrett campaign, which earlier this week circulated a CNN article about Haley's faith, denied having anything to do with the email.
"Our campaign is focused on the issues that matter to South Carolina voters, like Representative Haley's failure to disclose her income from a company involved with numerous state government contracts," said Barrett spokesman Robert Hughes.
Haley disclosed Friday that she was paid $2,000 in 2008 to do consulting work for an engineering firm in her home county, income that was not previously disclosed on her official state ethics filings.