How is this a long-term win for Mike Pence? Aside from the ~5 minutes on abortion toward the end, he spent nearly the entire debate talking about his running mate... most of which involved either denying that Trump had said things that all of us know that he's said or making incredibly tendentious excuses.
Pence is getting fact-checked for filth right now... so, we'll see.
I said in IRC, it kind of reminds me of the RNC Paul Ryan speech from 2012. It came across well as did he, but he got fact-checked almost immediately and it buried the positive spin.