Bennett said it in response to a Gloria Borger question, and I have not heard it anywhere else.
Listen to Herman Cain’s interview today with Laura Ingraham:
http://www.lauraingraham.com/pg/jsp/charts/streamingAudioMaster.jsp?dispid=302&headerDest=L3BnL2pzcC9tZWRpYS9mbGFzaHdlbGNvbWUuanNwP3BpZD0xMTc3Mw%3D%3D