Trump won the last election by a grand total of 80,000 combined votes in 3 states.

If he wins this time, it will be because he and his minions will find a way to get the election in front of the Supreme Court, but even if he does that, it's likely SCOTUS is suffering from what most of the rest of the country is suffering: a very bad case of Trump Fatigue. He won't be able to overturn election results without a legitimate claim in law.

Many of the people missed in those polls last time were people who suffered from Hillary Fatigue. She had been lambasted by Republicans for 30 years prior to the election, and for better or worse, she had very high negatives.

There is virtually no Biden Fatigue.

The dueling town halls benefited him with their Mister Rogers vs. Darth Vader split.

Most Americans are exhausted.

I doubt the current polls are catching that.

I won't be surprised if Biden gets 400+ electoral votes.

Did I mention how exhausted people are?