For years, Omarosa Manigault Newman stood at Donald Trump's side, making her deeply unpopular with African-Americans who see her as a sellout for aligning herself with a president who has hurled one insult after another at black people. Her falling out with Trump and her decision to call him a racist as she sells her new book — and in turn, his calling her a "dog" — have not been enough for many African-Americans to invite her back to the family picnic. Too little, too late, many said. "Her tell-all mea culpa won't win her any brownie points with most...