Democrats did this to Bush twice and Hillary didn’t give a concession speech on election night when Trump won.
The peaceful transfer of power ended in the 1950s and Democrats have been running shenanigans ever since.
Delay the results. Question the outcome. And if all else fails, IMPEACH! < /s >
Bingo! Kennedy & his thugs took away Nixion’s win in 1960 and the downward spiral has been constant since then.
Correction: Ended in 2000 with Bush v. Gore.