"You can see in her right knee, especially on the medial side, she has no space left between her femur and her tibia, " he said.

CNN: What you need to know about total knee replacement

On the down side, however, she has never run for elective office, has no domestic-policy experience and says she's not interested.

ECONOMIST: Yes, but they keep quiet about it

Diana has no intention of appealing to Canaan's better side - not that she thinks he has one.

BBC: Lamplugh family looks to the future