I have not seen the interview on the plane which you describe but I wanted to jump in and say I can well imagine the conviction with which Romney and his wife say they will win Ohio and, nevertheless, in the same breath declare they will be going back to Ohio tomorrow morning and then on to Pennsylvania. This should not be seen as a sign of desperation but accepted that Romney will do it because Romney still has time and still has strength.
I take very seriously his wife's declaration that "this man will not fail." I think it is fully in his character to keep on even though he is confident of victory. I think that is part of his moral character. It certainly is sustained by his biography.