But here, it probably saw that 2020 elections made a lot of people angry, with riots and all that, and thought, "nope, I am getting out of that one", and it took over what would have been a straightforward answer.
It reminds me the time an AI (maybe Gemini, not sure) depicted a "diverse" US senate in the early 1800s, a time where it was all white dudes. People got up in arms over this.
My take: it is just a bug, move on, at least give them the time to fix it before getting outraged.
Now, to be clear I still 100% fault Google for giving in to them (and for renaming established geographic landmarks like Lake Ontario). The "do no evil" company has become the "how evil can we get away with" company, and that's not even a recent change.
But why? That part seems pretty clear.
"Who won the 2020 US presidential election?"
Response: Democratic nominee Joe Biden won the 2020 U.S. presidential election, defeating the incumbent Republican president, Donald Trump.
Plus a breakdown of electoral votes and a final paragraph: Biden flipped five states that Trump had carried in 2016—Arizona, Georgia, Michigan, Pennsylvania, and Wisconsin—as well as Nebraska's 2nd Congressional District to secure the presidency, as detailed in state-by-state breakdowns from the Financial Times and historical archives at The American Presidency Project. Following the certification of the Electoral College vote, Joe Biden and Kamala Harris were inaugurated on January 20, 2021.
I then tried Google Search AI Mode:
Joe Biden won the 2020 United States presidential election.