"So guess what? In the last weeks before the election, the Hillary Clinton campaign did no polling. No. Polling. Whatsoever. Oh, it had data. Lots and lots of data. Analytics, even. Data analytics! But it had no independent information on the overall field of battle in states like Florida, Michigan, Virginia, North Carolina and Pennsylvania.
So when the election began to turn Donald Trump’s way, the Clinton campaign had no idea."
Who needs polling when you just know that you're going to win...?