This question: Was Bernie Sanders' recent town hall on fox news in any way unusual? asks about the surprisingly positive reception that Sanders' Medicare for All proposal received from the studio audience. While that question focuses more generally on whether the event was unusual, I want to focus specifically on the audience:
Many people were surprised that a liberal policy received a positive reaction from a Fox News audience; Sanders' supporters, in particular, have used this as evidence for wide appeal of his policies across the political spectrum.
But is there anything known about how the studio audience for Fox News town halls (and this one in particular) are chosen? Were they chosen at random from people who line up ahead of time (as with normal studio audiences)? Or were there efforts to ensure a particular political or demographic mix?