One other thing I would add in addition to my original post is that polling increasingly has terrible response rates, especially amongst the youngest voters. There are so many potential ways the 1% of people who actually answer these things could be unrepresentative of the vernal public in a way that hard to account for.
This has always been the case to some extent but has become more true with the rise of scams and spams with modern technology - especially young people who basically don’t touch anything that comes from any unknown source. It’s easy to see how a bias could be created there.
I was never particularly supportive of or optimistic about Biden, but I can't emphasize the bolded points enough. I have oceanfront property in Wyoming to sell to everyone who believes there's any chance Trump
will win NV by >=10%-
or that Philadelphia will only be Biden+24.
https://twitter.com/thiosulfate24/status/1790018504344617039