I don't need his one vote for Trump. He's doing enough good being an example of an honest reporter of both sides, which means he's after the press and Democrats far more than us, since that side has no other scrutiny.
They had a camera crew following Warren long before she got into it with Bernie and had the entire thing on that camera. It seems unlikely that they had the same setup for all of the candidates as they milled around.
A tipoff seems likely to me, especially since CNN's questions were just exactly what Warren needed to make the confrontation mean something.
The other side of this is that often the people they let in to university X can't handle it and flunk out, or downgrade to a lesser degree like activist studies.
If they had applied to another university without the bias, they would match the rest of the students in skill and likely had a successful college career.
Even when it works, it fails.
31 percent in NH? When being a Trump supporter on the east coast is a firing offense? That's a pretty good score.