If anything I've noticed the Fox polls have been a little bit more encouraging for Biden over the last six months, relative to other larger ones, which have shown larger Trump leads overall. Reuters had Biden up 2 at the end of May, now Trump up two this week. I think where polls can get more skewed politically is in more nuanced questions about issues - "more likely / less likely", etc. Who you voting for between two guys is tough to thumb the scale unless you sample specific demos / regions that go against the spirit of randomness.I wouldn't have posted the poll were it not from FOX, who I assume we can agree is not in the bag for Biden and the Dems.
All I need to do to prove you wrong about the democracy issue is share recent and direct quotes from Trump about J6 and the people charged with and convicted of felonies for their participation. He loves what they did, praises their efforts and calls them heroes, and promises to reward them with pardons. You can't get any clearer than that, and Trump is currently highlighting this message at every campaign event. I don't even need to get into the strength of the fake elector and J6 related indictments to prove my point.
If the FOX polling is accurate, a lot of others feel the same way I do and Biden's efforts to keep the issue front and center will continue to impact the race in a meaningful way.
I think betting odds generally do a better job of predicting winners, because folks have dollars at stake. The RCP betting odds went from Biden up in October to Trump +20 currently. That can certainly turn on a dime, as Trump was the heavy favorite towards the end of election night 2020, prior to all the mail-in votes being counted.