Could it be because the grand dame of the program Barbara Walters used to date the wily former fed chairman? Yes, our sources say, and Mitchell apparently doesn’t allow her hubby to be alone in the same room with Walters anymore. It made for quite awkward TV, with the elder Greenspan sitting between the two taut news ladies — not knowing which one to look at when he was talking. Mitchell, in fact, ended up chatting more than Greenspan, at one point saying that she likes to stay in bed with him as long as possible. Um, that’s hot?