Two things. One, they sought to effect their chosen outcome by releasing selective polling data. Two, because they did not think a Trump win could ever happen, they were blindsided. Hey, even they admitted it.
In other words, a Black Swan event — a Trump win — was theirs. But let me tell you who was not surprised by a Trump win. Those the pollsters thought didn’t matter.
These people are the regular folk in America who have been battling for eight years against the increasing encroachment of Big Government into their lives. Who have been punished every way they turn by legislation that stops them from doing business, forces them to pay others’ debts, and slaps them down every time they attempt to break out of the box and build their lives and businesses for the better.
Pollsters believed that everybody who wanted what Trump stood for were stupid, lazy, Southern white trash yahoos guzzling non-craft beers, and who were just waiting for the day they could sing Dixie, wave a Confederate flag, kick a gay man in the nuts, and lynch a brother on the courthouse steps. So, pollsters didn’t pay attention to the rest of the U.S.
Nor did they understand the true nature of the dissatisfaction of people of all colors and socioecnomic strata. The small business owners being regulated into extinction. Or the teachers tired of being held back from doing their jobs to fit some social construct that is alien to them. Or the good men who are told their every action shows hatred of women and the women who are being told they are still second-class citizens forever doomed to be victimized by those evil men.