The answer is obvious and I've stated it many times. I guess you just need a little help getting there like with the 15 million thing... It was a COVID election. Massive engagement and turnout. People were coming off a year of being locked inside, businesses shut down, economy on the verge of collapse. The stacks were high and people had nothing else to do but watch the news which was mostly politics.
Thats not a partisan assessment, it is just reality and common sense. The result was that Trump got 11 million more legit votes than he did in 2016. Do you agree with that?