Herman Cain told Forbes that he believes Curt Anderson, who worked on his 2004 senate campaign and whose firm is now employed by the Perry campaign, is responsible for the leaks about the sexual harassment allegations. From Forbes:

“I told my wife about this in 1999 and I’ve got nothing to hide,” Cain told me Wednesday. “When I sat down with my general campaign consultant Curt Anderson in a private room in our campaign offices in 2003 we discussed opposition research on me. It was a typical campaign conversation. I told him that there was only one case, one set of charges, one woman while I was at the National Restaurant Association. Those charges were baseless, but I thought he needed to know about them. I don’t recall anyone else being in the room when I told him.”
Curt Anderson phoned me to say “I never heard about this story until I read about it in Politico. I have nothing but good things to say about Herman Cain. I’m not going to bad-mouth Herman Cain to anyone, on or off the record. I think he is a guy of great leadership and integrity.”