The triumph for Mr. Trump, 70, a real estate developer-turned-reality television star with no government experience, was a powerful rejection of the establishment forces that had assembled against him, from the world of business to government, and the consensus they had forged on everything from trade to immigration. (Matt Flegenheimer and Michael Barbaro, Donald Trump Is Elected President in Stunning Repudiation of the Establishment, The New York Times (Nov. 9, 2016))
Several pollsters rejected the idea that Trump voters were too shy to tells pollsters whom they were supporting. But James Lee of Susquehanna Polling & Research Inc. said his firm combined live-interview and automated-dialer calls, and Trump did better when voters were sharing their voting intention with a recorded voice rather than a live one.
Women who voted for Trump might have been especially reluctant to tell pollsters, said David Paleologos of Suffolk University. The USC Dornsife/Los Angeles Times poll corroborated that: “Women who said they backed Trump were particularly less likely to say they would be comfortable talking to a pollster about their vote.” (here)