UPDATE: After seeing Holt's performance, it is obvious that he was not a politically neutral moderator.
He asked 3 or 4 questions about Trump's dirty linen, but none that might have embarrassed Hillary, and there easily could have been 3 or 4, had Holt wished to pose them.
So if Holt is a Republican (rather than a closet Democrat), then he is definitely of the RINO variety.