Matt Schneider is probably right. There's a good probability that there are millions of potential Trump voters out there who won't speak up. They'll vote, but anticipating the inquisition that would follow any overt support of Trump, they remain silent. See Matt Schneider's October Surprise! Why ‘Silent Majority’ Won’t Reveal Trump Support Until Last Moment!:
In a media environment that every day finds new ways to report on “trumped-up” allegations that Trump is racist, misogynistic, homophobic and any other unflattering characterization one could imagine, is it any wonder that most people in polite society rush to publicly declare their disdain for the Republican presidential candidate? What they believe privately, I’d argue however, is an entirely different issue.
I'd argue that Hillary Clinton's supporters should be the ones who have a right to remain silent. Strangely, they don't seem to be phased by any public exposure of her shortcomings. The rallying cry is that there were no indictments. Maybe that's the way of the left. Let nothing interrupt the movement.