Kaine is weak, as has been noted here many times in the recent past. His convictions are not very convincing. Pence, while being a right wing bigot, is very sure of his convictions. Not that I think this debate will matter one whit. Both have the charisma of wet rag. I don't think they'll add anything to the respective campaigns.

"The liberals can understand everything but people who don't understand them."
Lenny Bruce

"The cleverest of all, in my opinion, is the man who calls himself a fool at least once a month."
Dostoevsky