From your link.
A key principle in political communication is that candidates for public office may not be successful by exclusively preaching to the choir. Sanders decision to talk with Fox News shows that he and his handlers understand this principle. Moreover, moving outside his comfort zone to speak to an audience comprised of many who do not share his political beliefs appears to have been successful.
To the surprise if not chagrin of the Fox hosts, Sanders received enthusiastic applause from the town hall audience on several important issues; most notably, the audience expressed a clear willingness to give up their current healthcare insurance plan for a single payer provider
Interesting. Speaking outside his comfort zone(Faux snooze) was successful Yet speaking to WOC, which is also outside his comfort zone @ #SheThePeople (Our Democratic base) was not. He was booed.
One more thing I would like to add. His "handlers" so the article called them here:
Sanders decision to talk with Fox News shows that he and his handlers understand this principle. Moreover, moving outside his comfort zone to speak to an audience comprised of many who do not share his political beliefs appears to have been successful.
So his "handlers" understand the principle and when they do not like the results, then said handler Nina Turner, blasts not, Faux who roared their approval and instead blasted WOC for booing a non answer from BS.
Go figure.