Who is responsible for exit polls?

[Treant]

1. They're selective polling

You ask 1 voter out of every X voters (or every X voters of a certain race, or however they're polling) how they voted, but they're not required to tell the truth, answer your question, or acknowledge your presence.

I've been asked, but always turned it down. I consider my vote private data.

I've also read that exit pollsters won't approach "certain people" who they think look volatile or problematic.

The candidate with the more evangelical followers (now, who could that be in this race?) tends to do better on exit polling. Candidates with voters who can afford to take a few extra minutes will do better than those who can't, if there's a discrepancy in that data.

So really, any split that would encourage or discourage talking to the pollster has an impact.