[NearAP]

My apologies if I misunderstood your statement but I interpret it to mean that you're skeptical that Biden received a large number of votes compared to Obama.

If my interpretation is correct, then I think you're missing the big factor that conservatives and registered Republicans actively campaigned for Biden. They didn't just reject Trump, they explicitly said they were voting Biden, Campaigned for him, asked their fellow GOP members to vote Biden over Trump.

At the end of the day, you had Democrats + Independents + Conservatives voting Biden. That coalition didn't exist during Obama's time. In fact, the people who most likely voted for Romney were the people who were now voting for Biden