US President Donald Trump's niece believes German Chancellor Angela Merkel is far smarter than her uncle, she told dpa. “The woman could run circles around him intellectually,” Mary Trump said in an interview ahead of the publication of her tell-all book, Too Much and Never Enough: How My Family Created the World's Most Dangerous Man , in Germany on August 12. “And I think he hates that. And it makes him crazy,” she added. Mary Trump, a clinical psychologist, said the president's contentious relationship with Germany is in part due to its powerful woman leader. “Donald doesn't do well with strong women,” she said. Having written in her memoir that a Trump win in November's presidential election would mark the end of US democracy, Mary Trump said would vote for his Democratic challenger Joe Biden. “I'm a liberal Democrat,” she said, but added: “We're not dealing with Democratic or Republican any more; we're dealing with right and wrong.” She said the main goal for her book was to provide information to the public about her uncle that they did not have in 2016. “So regardless of how people vote in November, they can no longer say, 'Oh, you know, I didn't know, I had no idea that he did this'," she said. Harvard cheers as Angela Merkel takes aim at Trump’s politics Mary Trump said her uncle claimed to be of Swedish descent when dealing with Jewish real estate developers in New York so as not to “offend” them, although his family hailed from Germany and Scotland. “We have no Swedish at all in our family. Not sure why he didn't say Scottish,” she said. “It's bizarre.” She described the president as a racist and a pathological liar, saying “he's been lying every day of his life”. Mary Trump criticised the US media for taking years to call out her uncle's lies, and for “dancing around” his remarks in the recent debate about racism in the country by describing them as “racially tinged or controversial”. “No, they're racist. He is a racist. It needs to be said that straightforwardly,” she said. The psychologist explained Trump's handling of the coronavirus crisis in the context of his family dynamics, noting that his father created an “atmosphere of toxic positivity where you were not allowed to express anything negative.” “So Donald also learned that lesson. You don't talk about anything that's negative. You don't acknowledge it. You ignore it and it'll go away. Obviously, that didn't happen,” she said. 5 most controversial claims about Trump in niece Mary’s new book Course correcting would be admitting he made a mistake, “and he's equally incapable of doing that because also in my family, apologising or admitting you're wrong was considered a mortal weakness,” she added. Mary Trump has long been estranged from her family. She is the daughter of the president's eldest brother Fred, who died in 1981 after years of struggling with alcoholism. Her book was published in the United States in mid-July, despite a bid by the president's younger brother Robert Trump to block its release, citing a non-disclosure agreement Mary Trump signed after a court battle over the estate of the president's father.