• Mary Trump's father was Fred Jr., Donald's older brother.
  • The niece's comments echo details from “Too Much and Never Enough,” which lays out her uncle's emotionally abusive family life
  • The White House pushed back,  insisting the book is "clearly in the author’s own financial self-interest.”

President Trump's niece is pressing her uncle to resign as president in an interview to discuss her new bombsell tell-all about her family.

Mary Trump told ABC News that she wouldn't mince words if she had the chance to confront him in the Oval Office.

"Resign" is what Trump would tell the younger brother of her father, Fred Trump Jr.

“I saw firsthand what focusing on the wrong things, elevating the wrong people can do – the collateral damage that can be created by allowing somebody to live their lives without accountability,” Trump said. “And it is striking to see that continuing now on a much grander scale.”

“He already seemed very strained by the pressures,” Trump continued. “He had never been in a situation before where he wasn't entirely protected from criticism or accountability or things like that, and I just remember thinking, ‘He seems tired.’”

Trump’s words echo her book, “Too Much and Never Enough,” which discusses how her uncle’s upbringing molded him.

Excerpts detail a man who was both shielded from criticism and emotionally abused by a family headed by one of New York City’s most powerful real estate magnates, Fred Trump.

Mary Trump claims her grandfather played an outsized role in shaping her uncle into a man who sees people as “pawns to be used to his own ends.”

“It’s impossible to know who Donald might have been under different circumstances and with different parents,” Trump told ABC. “But clearly he learned the lesson.”

Trump's other uncle, Robert, sued unsuccessfully in New York to both block publication of the book and stop her from speaking. He lost his lawsuit Monday.

The White House has downplayed both Mary Trump and her book.

“Mary Trump and her book’s publisher may claim to be acting in the public interest, but this book is clearly in the author’s own financial self-interest,” a statement said. “President Trump has been in office for over three years working on behalf of the American people – why speak out now? The President describes the relationship he had with his father as warm and said his father was very good to him. He said his father was loving and not at all hard on him as a child.”

US President Donald Trump is described by his niece Mary in her forthcoming book as a "narcissist"
US President Donald Trump is described by his niece Mary in her forthcoming book as a "narcissist" AFP / JIM WATSON