At this point I don't believe in polls because I could see if Harris was making mistakes left and right and Trump's crowds remained the same size or even grew but the opposite is true. Trump's crowds are shrinking. He is making gaff and gaff. His smaller donations are all but dried up and the only people who are supporting him are shadowy foreigner investors and 1%. With the money they have, they can create whatever polls they want to say whatever they want. 

Polls mean nothing at this point. Just get out there and vote. In many places, early voting has already started. Make your voice heard and go! Polls don't matter. Voting does.