Because he could no longer abide frightened and sniveling morons still railing about an election where millions of illegal votes supposedly were cast, even though there is not a shred of credible proof that it happened. But these sad people are so enamored of a certifiably whack-o misogynistic megalomaniac who is such a monstrous narcissist he cannot accept his crushing defeat that they continue to propagate the big lie.
I hear that busses are being chartered so any of you that still believe this fairy tale can catch a free ride to the Tallahatchie Bridge. Good luck!