Updated

In an interview with Greta Van Susteren scheduled to air on Fox News Monday night, Republican presidential candidate Herman Cain for the first time revealed details of what he says are part of the sexual harassment claims leveled against him while he was CEO of the National Restaurant Association

"I can't even remember her name, but I do remember the formal allegation she made in terms of sexual harassment," Cain said of one of his accusers, who he recalled was a writer in the association's communications department. "She was in my office one day, and I made a gesture saying, and I was standing close to her, and I made a gesture saying, ‘You are the same height as my wife.' And I brought my hand up to my chin saying my wife comes up to my chin."

Cain says the incident was investigated by National Restaurant Association's general counsel and human resources department. "It was found to be baseless," he insisted.

The GOP hopeful also offered insight into the settlement of the case saying, "My general counsel said this started out where she and her lawyer were demanding a huge financial settlement, I don't remember a number, but then he said because there was no basis for this, we ended up settling for what would have been a termination settlement."

That's a different story from what Cain told a packed audience at the National Press Club Monday afternoon when he said he was unaware of any cash settlements made to his accusers. "I hope it wasn't for much, because I didn't do anything."

The sexual harassment allegations stem from a Politico report that two women, who were subordinate to Cain at the time, accused him of inappropriate behavior and reportedly received five-figure payouts after signing an agreement with the trade association. The agreement also barred them from discussing the matter. The report quotes anonymous sources and describes how the two women felt "angry and uncomfortable" with Cain's behavior, which they said included sexually suggestive conversations.

On Greta's show, Cain also said he was unaware a second woman, described by Politico as working in the restaurant association's government affairs department, had accused him of an unwanted sexual advance during a trip to Chicago. "If I had a private conversation with her, I don't recall it," Cain said.

The campaign is now aggressively pushing back against the allegations, with Cain himself characterizing them Monday at the National Press Club as "a witch hunt."

He added, "in all of my over forty years of business experience, running businesses and corporations, I have never sexually harassed anyone."

Cain has shot to the top of both national and early state polls, but earlier Monday during an interview on Fox's "Happening Now," Cain admitted the allegations have become a distraction."Some people are gonna be turned off by this cloud that someone wanted to put over my campaign," he said. "We'll just have to wait and see what happens."

Watch Greta Van Susteren's full interview with Herman Cain at 10 p.m. ET tonight.