I just took a look at the total vote numbers. Some interesting observations:
1. Biden received 81,282,501 votes.
2. Trump received 74,223,975.
3. Both numbers were record turnouts. I think the reason was largely related to the mass numbers of mail-in votes. I think the numbers for both parties will drop in 2024.
4. Just like 2016, the "popular vote" was dramatically impacted by California and New York. In 2016, Hillary Clinton's entire popular vote spread came from California. In 2020, Biden got 11,110,639 votes in California and 5,249,886 votes in New York.
5. In 2020, Trump got 6,006,518 votes in California and 3,251,987 votes in New York.
6. The Biden spread in California was 5,104,121 and in New York was 1,992,899, for a total of 7,097,020.
7. Biden's total popular vote spread in 2020 was 7,059,526. In other words, the California and New York vote totals account for all of Biden's popular vote spread.
8. If you subtract California and New York from both Biden and Trump, Biden got 64,922,976 votes and Trump got 64,965,470. In other words, Trump got more popular votes than Biden outside of California and New York.
I'm pretty sure Trump never set foot in California during the 2020 election.
Good context for Biden's 81 million votes.
https://en.wikipedia.org/wiki/2020_United_States_presidential_election