I remember that whole election starting off very poorly for Nate Silver.

After reading this book, The Party Decides https://press.uchicago.edu/ucp/books/book/chicago/P/bo592160... , he was a big advocate of the idea that the "endorsement race" of state officials and unelected party leaders.

There was a whole "Party Decides: Endorsement Tracker" graphic and everything, but Trump securing the Republican nomination and eventually the presidency pretty conclusively showed that theory to be a relic of the past.

So the 538 election coverage that year was: - Party endorsements matter more than early polling (they didn't) - Hillary's up so big there's no way Trump can win (he did, and yes I know they didn't actually say that but that's what the layman saw)

(ironically the Party Decides thesis seems to have correctly predicted events in the Democratic primary that year)