I'm guessing it's probably circa 60% or even more.
https://en.wikipedia.org/wiki/Spiral_of_silence The
spiral of silence theory is a political science and mass communication theory.....which stipulates that individuals have a fear of isolation, which results from the idea that a social group or the society in general might isolate, neglect, or exclude members due to the members' opinions.
This fear of isolation consequently leads to remaining silent instead of voicing opinions. Media is an important factor that relates to both the dominant idea and people's perception of the dominant idea.....
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1. The fear is real, especially with many Trump supporters
The left was absolutely effective at branding Trump as a racist after his campaign announcement. I knew they would use his words against him when I heard him.
So if you wear a maga hat or support the president you are automatically racist or inciting violence or discourse by being pro trump. It is very hard to de-program the average citizen with all of the propaganda they are pumped with day in and day out.
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2. It's similar with the "
Bradley Effect."
I forget when it was, but anyway, one election Tom Bradley, then the mayor of Los Angeles, ran as the Demo candidate for governor of California; his Republican opponent was a white dude.
All pre-election polls forecast an overwhelming Bradley victory.
But that's not what happened; the Republican won, and by a good margin.
The discrepancy between the poll numbers and the election numbers was because many voters were afraid of being seen as racist if they told the truth, so they lied to the pollsters, saying they'd vote for Bradley.