Why is Trump not ready to leave the White House after defeat?

Fresh off his election loss, US President Donald Trump is stewing in the White House as the coronavirus pandemic hammers America with a winter surge that is sending almost all its 50 states into red alert.
The "dark winter" warning has been sounded long ago but there is a deafening silence from a White House preoccupied with fighting election results and scolding Pfizer for releasing its encouraging vaccine news after the Biden victory.