So why is Mike Pence's daughter missing the reflection? Simple, she's behind him from that angle in the reflection, her white top blends with his shirt, and the little of her hair that is visible blends with the background.
There's possibly some hair there, but it kind of blends in.
I've also seen similar restaurant illusion pictures where there is a similar-looking couple on the other side of a divider that tricks you into thinking it's a mirror. That was actually my first thought when I saw this picture.
I don't think that's the case here, though, because the mirror has a frame.
I love this website for all the effort put into debunking. Nowhere else have I ever seen people come up with their own models for this. I didn't even know this was a thing people were talking about, but this thread reminds me this place is always a valuable resource.