Thanks all, sorry for the brevity and being incorrect about him “filling in.” I just wanted to get it posted as fast as possible.
I watched the speech and he killed it. He did an especially good job of addressing “grading on the curve” and Hillary’s toughness. And he had an extended bit on Trump’s lack of transparency compared to Hillary’s. (When they post the video on the YouTube channel I’ll try to embed it.)
Every time I get nervous about the election I remember Obama, Michelle, and Joe are going to be out there, too and I feel better. They have no one on their side even close in stature. A pretty strong bench has her back.