Sounds like you are proposing something similar to the Bradley Effect. From wiki, it was suggested that "white voters give inaccurate polling responses for fear

Sounds like you are proposing something similar to the Bradley Effect. From wiki, it was suggested that "white voters give inaccurate polling responses for fear that, by stating their true preference, they will open themselves to criticism of racial motivation. Members of the public may feel under pressure to provide an answer that is deemed to be more publicly acceptable, or 'politically correct'. The reluctance to give accurate polling answers has sometimes extended to post-election exit polls as well." It's not a white/black choice this time around but the social exclusion in some circles of people who support Trump might see something similar in play. That said, it would need to be a pretty big effect to make a difference if the gap is really 6 or 7 points. [1] https://en.wikipedia.org/wiki/Bradley_effect https://en.wikipedia.org/wiki/Bradley_effect