The polls have been used by the left, as an election tampering tool. They are hidden campaign contribution designed to discourage Trump voters. If Biden is 17 points ahead, what is the point of voting for Trump! Fortunately, nobody with half a brain is accepting that, from the same people who brought us the collusion delusion.
The polls constantly over sample Democrats, since Republicans do not wish to be a target by standing out to the speech police and rioting mobs. These are other tools to discourage voters. This silent majority will come out on election day and polls will be wrong like in 2016.
I heard an interesting set of statistics. Trump rallies are analyzed by supporters, in terms of the people who attend. What they found is the audience contains a significant percent of Democrats, as well as up to 25% people who do not normally vote. Unlikely voters for Trump, on paper, are never part of the polls. They will show up.
The black vote for Trump is near about 30% which is high for a Republican. This is the trend of the future. My prediction is Trump wins the electoral college and the Democrats throw another temper tantrum. Those who participated in the coup will be punished. This will include the regulation of social media, and the redefining of journalism so slander and liable suits become possible against propagandists.