The first problem I see is that NBC is doing the polling. As I understand it, they are, and have been, in a contest to see which one can pump out the most fake news. Why would I believe ANYTHING from NBC; or BUY ANYTHING from their advertisers?
The reason Trump supporters polled lower on election day had nothing to do with Comey's late 'announcement, or Seth Rich's email dump, or Clinton being 'establishment'... It had to do with THE SAME REASON WE DON'T PUT TRUMP STICKERS ON OUR CARS OR TRUMP SIGNS IN FRONT OF OUR HOMES.
FEAR.
Before the election a friend accidentally 'outed' a college professor who's wife was a friend. He was sickened by being outed (just to one person) but feared the social shunning and contempt that would accompany his outing... All of us have stories - keyed cars - subtle threats... not so subtle threats...shunning.
NO ONE who's still supporting a family should risk telling a stranger on a phone that they're supporting President Trump.