I also think that there is a real possibility that there are a lot of Trump supporters that are unwilling to tell a pollster hiw they really feel. There has been so much negative press and so much shaming test people don’t want to answer.
And people have the impression that the NSA is monitoring all phone calls.....resulting in something like this....
Obamacare Navigator: ..."your voting record does nor conform to standards"
..."and your answers to polling questions prior to the last election are way out of line..."