Re: 21 - Crowd size is really not a strong indicator. Biden did NOT want crowds at all. Remember the circles around chairs?
Add to that that Biden probably knew that he could not attract large crowds.
Regardless of how large crowds are, how can anyone extrapolate that into votes? Crowds are an incredibly small number compared to the number of people that vote.
In 2020 Biden got 81 million votes, how do you beat that?