SIMON HEFFER HINTERLAND

In classical music, there’s one label I can always count on

‘You must be kidding.” On the veranda of a manicured mansion in Connecticut, a woman looked at me, halflaughing, half-aghast. No, I told her. I really wasn’t. I had indeed come to ask about Donald Trump’s family feud. She slammed the door in my face.

It was the run-up to the 2016 presidential election, and the rumour was that the Republican candidate had paid off his relatives to keep quiet about dark family secrets. I started knocking on doors. I wasn’t too successful.

Now, four years later, that door has been karate-kicked open by Trump’s 55-year-old niece, Mary, daughter of the president’s alcoholic brother, Fred Trump Jr, and sister of the man in the Connecticut mansion. In a deliciously gossipy, tell-all book, subtitled How My Family Created the World’s Most Dangerous Man, she sets out to skewer her uncle.

Trump-bashing is a national sport, of course, but no one who

has so far attempted it knows him even fractionally as well as Mary. A clinical psychologist, she imagines him on the couch: “In order to get a complete picture of Donald, his psychopathologies, and the meaning of his dysfunctional behaviour, we need a thorough family history.”

Looming large is Fred Trump Sr, her “sociopathic” grandfather; he hated his daughter-in-law, Mary’s mother, whom he blamed for Fred Jr’s drinking. Fred Jr, to whom the book is dedicated, died aged 42 in 1981, when Mary was 16. The Trump family left him unattended at a hospital on the night that he died, Mary writes. Donald and his sister, Elizabeth, were at the cinema.

According to Mary, Fred Trump Sr’s empire was at one point worth a billion dollars, yet the tight-fisted patriarch kept much of his family in one-bedroom squalor. His daughter Maryanne had to beg her mother for “change for the laundry”. Fred Jr was unable to get a mortgage, and when he told his

father he wanted to be a pilot, Fred Sr called it being “a bus driver in the sky”. “Everyone in my family experienced a strange combination of privilege and neglect,” writes Mary.

Donald Trump, Mary suggests, was traumatised by an abusive father, and “institutionalised for most of his adult life”. He emerges from her analysis as domineering, incapable of kindness and adept in the “casual dehumanisation of people”. She speculates that he suffers from sociopathy, narcissism, even an undiagnosed learning disability – not helped by sleep disorder, “a horrible diet”, 12 Diet Cokes a day and no exercise.

Mary kept in touch, attending Ivanka’s wedding, and even assisting Trump with his 1997 book, The Art of the Comeback. But the family ties were severed in

1999 when Fred Trump Sr died, and Mary and her brother, Fred Trump III, discovered they had been cut out of his will, depriving them of what they believed was their rightful share of millions.

It was later claimed by the New York Times that Donald Trump had tried to give himself sole control of the estate – a Machiavellian scheme only stopped, his sister Maryanne said, by “sheer luck”. It was a nasty court battle; at one point, medical benefits were cut off to Fred Trump III’s infant child,

who was born with cerebral palsy. Trump’s sister, Maryanne, a former federal judge, tells Mary that she considers him “a clown” with “no principles”. Asked rhetorically what Trump has ever achieved, Maryanne replies: “He has had five bankruptcies.”

In 2001, Mary and her brother settled the lawsuit. The exact terms are not known, but the settlement included a payment to them both, and a confidentiality agreement, which Mary has adhered to for nearly 20 years. Why break it now?

Before the election, she explains, she worried she “would be painted as a disgruntled, disinherited niece looking to cash in or settle a score”. Then, in 2016, she felt that “62,979,636 voters had chosen to turn this country into a macro version of my malignantly dysfunctional family”. Her urgent message to voters is that there is “no one less equipped than my uncle to manage” the tsunami of disasters confronting America.

Under its clinical surface, Mary’s book is at heart catty tittle-tattle. Unlike the devastating memoir of Trump’s adviser John Bolton, which revealed the president’s ignorance, inconsistency and lack of moral fibre in office, her book just confirms what many people believe already: he’s just not a very nice person, riven by “pathological weaknesses and insecurities”.

The White House has described Mary’s book as “fiction”, written in her “financial self-interest”; a spokesman has said that the president has described his father in warm terms; and that Mary’s allegation about him paying another student to sit his SATs for him is “completely false.”

Mary hopes that the grenades being lobbed by her, Bolton, Michael Wolff and others will work. “Unlike any previous time in his life, Donald’s failings cannot be hidden or ignored, because they threaten us all,” she writes. “The walls of his very expensive and well-guarded padded cell are starting to disintegrate.”

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