Even if the blockade is only temporary, it flouts the First Amendment of the US Constitution, which protects freedom of expression, he said.

Sylvie Claire / July 1, 2020

"This book, on subjects of great interest and importance for public opinion concerning a president in office during an election year, should not be censored, if only for one day," said he added.

Mary Trump, 55, a psychologist, is the daughter of Fred Trump Jr., the elder brother of the Republican billionaire who died in 1981 at the age of 42 from alcoholism.

In this 240-page book, she recounts events she witnessed in her grandparents' home in New York, where Donald Trump and his four siblings grew up. 

"It describes a nightmare of trauma, destructive relationships, and a tragic mix of neglect and abuse," said Simon & Schuster.