If you don’t have a reference for something like that, you should never, never, repeat such a thing. Be assured, if there were anything like that, we would have heard about it BEFORE McCain won the nomination. One of his rivals would have dropped it to ruin him.
It was discussed during the 2000 election cycle and Jim Robinson said the same thing to me, then Maureen Dowd published the article that stated the accusation is a matter of congressional record. Ask him if he remembers the incident.