Donald Trump’s niece slammed Eric Trump’s attack on the former president’s nephew, who made waves this week in a new book about life growing up in the Trump family. In the book, “All In The Family,” Fred Trump III claims he heard his famous uncle repeatedly use the N-word while blaming Black people after his car had been vandalized in the 1970s. A Trump campaign spokesperson called that claim “completely fabricated and total fake news of the highest order.” Want more breaking political news? Click for the latest headlines at Raw Story. Fred Trump also shared in the book, published this week, h…