Herman Cain revealed Monday that an Atlanta-area woman would soon come forward alleging an "extended," 13-year extramarital affair with the Republican presidential candidate, telling CNN her claims are untrue.
Cain told Wolf Blitzer he wanted to "give you a heads up and everyone a heads up" that the woman would be coming forward.
He said he knows the woman - but that he did not have an affair with her.
According to an Atlanta affiliate of Fox News, a woman is claiming that she and Cain had a 13-year long affair.
"Here we go again," Cain said in response to the forthcoming allegations. "I didn't do anything wrong."
Cain described the woman as an "acquaintance who I thought was a friend" and said his campaign was going to handle the charges "detail by detail, accusation by accusation."
Two women, Karen Kraushaar and Sharon Bialek, have come forward to publicly accuse Cain of sexual misconduct in the 1990s, while he was head of the National Restaurant Association. Bialek has accused Cain of putting his hand under her skirt and pushing her head toward his crotch after a dinner meeting in 1997, after she had been let go from the National Restaurant Association. Two women have also made anonymous accusations against Cain for sexual misconduct.
Cain has repeatedly denied the allegations, saying, "I have never acted inappropriately with anyone. Period." Speaking of Bialek, he suggested that "the Democrat machine" brought forth "a troubled woman" in an effort to bring him down.
The allegations, which broke at the end of October, appear to have hurt Cain in opinion polls. From the middle of October through the first week of November, Cain was polling in the 20-30 percent range, putting him atop polls of the GOP presidential contenders. Recent polls show him sliding to support in the mid-teens, behind Mitt Romney and Newt Gingrich.