I’m going to take this poll and political polling for the foreeable future with a pinch of salt until I start seeing polling matching up to the reality of the results. Not all pollsters got the US election wrong, but many did, and the the polling industry has a lot to do in the political arena, quite frankly, before they start getting their credibility back, after many got the election and the electoral votes that Trump would win, so wrong. It was their polling that actually may have contributed to Clinton losing because the Clinton camp probably felt that they were doings lot better looking at some of those polls than they actually ended up doing, and didn’t put the time and/or resources in to certain states.
As I said before on a thread I think you made about Trump and his approval ratings earlier this week, Trump is controversial and many people may not want to tell a pollster that they approve.
Similar to how some people may not have told pollsters prior to the US election that they were supporting Trump and then you had a massive turnout of support for him in some unexpected places.