I think we were deluding ourselves if we thought this was going to be a Trump landslide. It was always going to be close, if for no other reason than a big chunk of the American public has been told how absolutely terrible (and racist..and mysoginist..and..and..) Trump is for the past nearly 4 years.
Few seem to have voted FOR Biden, but a large number of Dems and Is voted AGAINST TRUMP. So here we sit..
They control the Swamp. President Trump never had time to deal with that.
Adequately. He needs (needed) four more years to have a chance.