Having watched the full debate and listened to and read the post-debate conversation, I think it is clear that Kaine's behavior cost him a clear win. 

He was much more focused and honest about the positions of his candidate. However, his aggressive interruptions and jumpy body language were a distraction and, personally, off-putting (it should be noted that Pence, while not interrupting as much, also interrupted). 

Since it was only a week ago that Trump was roundly criticized for doing the same, it makes me wonder why Kaine would employ such a strategy, which he started doing with the very first question asked to Pence. I think a win for Pence on style and a win for Kaine on substance is an accurate analysis. Yet, I think it is Pence, not Kaine, who will personally benefit from this debate for any future decisions to run for office.