A family member of Donald Trump on Sunday exploded in confusion around the fact that the presidential polls are so close, despite Trump being, according to her, entirely unfit for office. Mary Trump, a trained psychologist who has been critical of her uncle and has endorsed Vice President Kamala Harris, over the weekend took to her Substack blog to vent her frustration with the idea that Trump is still being taken seriously as a presidential candidate. “I’ve been trying to wrap my head around this mystifying fact: the national presidential polls show Kamala Harris and Donald Trump within a poi…