People make a mistake about the 2016 election as proof pollsters got it wrong, there is some nuance about that.....
1. they got the percentage dead on right she'd win by about a couple points....just the votes were in the wrong places 2.6 million more votes for one candidate would make anyone assume that she won. So different set of standards Electoral College math vs national poll math
2. Wisconsin was close to tilting due to the the midterms before, Michigan to anyone who was paying attention noticed in the primary 2016 the GOP had more votes, Pennsylvania was a worry and hence the reason the last minute rally for her in 2016.
3. Voter Suppression and Apathy worked perfectly
4. People lied at the exit polls, even Paul Ryan received a phone call soon after the polls closed, that the GOP modeling/Turnout expectations were that Trump would go down in flames, Schumer was going to be Majority leader, the GOP would keep the house but it'd be very close....so to say hahaha they knew...they were wrong as well.
5. it is the equilivent of getting a bad beat hand is what happened you are dealt a full house in poker only for the last card to come down and give the person an straight flush (when they started with a 3 and 7)