Why will Trump not concede to Biden winning? He already won.?

The fraud thing is a bit of a sham. Half of the money sent to finance Trump's so-called fraud campaign goes (back) to refinance the depleted Republican war-chest after their failed election campaign.

Because Trump cannot accept that he lost.

Trump hates to lose. His ego is too big to let it go.

Because he won dummy, havn't you heard of all the fraud that took place. Open your eyes. There is no way that clueless Biden had a chance  of winning this election. While Trump's rallies were filled with millions.  There is evidence of massive fraud. That's the only way Biden had a chance. If you doubt me look for Sidney Powell talking about Dominion.

Because conceding is the ultimate humiliation.

He believes one term presidents are losers!

Why is everyone here asking us and not him? How are we suppose to know that? I don't work in the White House. 

To quote Dumb and Dumber..........."So you're saying there's a chance".

He is afraid to let go.