The unmitigated failure of predictors in this election

I don't think people still quite grasp how disastrous this election was for "classic" predictors:

The Selzer poll

The GDP-Favorability correlation

The 13 Keys

The Washington Primary

Machine learning methodologies

The Primary Model

The Dow Jones Industrial Average

All of them dead wrong.

In the midst of this entire fiasco, polls were probably the best predictor, even though they pointed to a close race and it was more akin to a blowout.