Biden 2020 has to be near the bottom. He took a year with perhaps the most heavily anti-incumbent fundamentals ever seen in a US Presidential election, and made it a close race.
It wasn't all just "re-alignment" either. Biden and the Democrats made so many terrible decisions as far as campaigning goes. Even though the scientific evidence surrounding the danger of COVID was still quite unknown, there was no reason for Biden and Democrats not to be doing outdoor town halls and drive-in rallies as soon as the beginning of May. The rioting was also a huge failure on their part. Something Biden and Democrats could've safely done was immediately (once the violence stopped) show up and support those whose property was destroyed by the rioting, which shows both empathy and strength when we had a president that was infamously hiding in a bunker. Biden's invisibility was pretty pathetic, at the time and especially in hindsight. He also missed a huge opportunity to blame Trump for the shutdowns. Rather than make the election a battle over staying inside and only leaving home to go to Walmart, Biden should've tied Trump to the shutdowns.
Of course hindsight is 2020, but even at the time these should've been pretty obvious to political campaigners that were even remotely in touch with the American voter.
