Michelle Obama urged Trump to admit defeat in a "powerful" and "scathing" Instagram post.
The former First Lady reflected on having to put her "anger aside" when Hillary Clinton lost four years ago and urged Trump to do the same.
Our democracy is so much bigger than anybody’s ego. Our love of country requires us to respect the results of an election even when we don’t like them or wish it had gone differently.
Obama also criticised Trump for pushing "groundless conspiracy theories" to his followers. Since losing the election, Trump has repeatedly claimed that the election was rigged against him and that he won over Biden.
She also recalled welcoming Melania Trump into the White House to ensure a "seamless transition of power" between the administrations, in spite of the "racist lies" the Trumps spread about her and her husband.
Both Donald and Melania Trump demanded that Obama publish his birth certificate to prove he was really born in the US.
I have to be honest and say that none of this was easy for me. Donald Trump had spread racist lies about my husband that had put my family in danger. That wasn’t something I was ready to forgive.
But I knew that, for the sake of our country, I had to find the strength and maturity to put my anger aside. ... This isn’t a game.