Former President Joe Biden is releasing a new memoir in which President Donald Trump privately praised Biden in a letter left for him as he departed office in January 2021. Trump expressed confidence that Biden would be “true to yourself and the American people.” Biden previously described the letter as "very generous" but kept its contents private. It's included in Biden's memoir, "Promise Me, America." Biden's book also criticizes Trump's administration for damaging institutions and inciting division. Biden harshly condemns Trump's role in the Jan. 6, 2021 Capitol attack, stating it should never be forgotten.