I think this is by design. He mentioned at the end that he was being very nice, but she has just been attacking.
This gives him an opening to go after the Clinton Crime Family later.
If you sift through all the online commentary, the thing that stands out most is how biased the moderator was.
No one likes a home-town ref and Americans detest seeing someone ganged up on.
Therefore, I think Trump comes out on top.
Yeah, he made it a point that he was being nice to her, holding back on things. There was a lot of low-hanging fruit he ignored. This time.