President-elect Donald Trump’s niece, psychologist Mary Trump, took a hatchet to pundits Monday, broadly blaming Vice President Kamala Harris’ campaign loss on an insufficient focus on working-class issues, an idea pushed by Sen. Bernie Sanders (I-VT), or that she focused too heavily on social justice issues. If you listen to pundits, wrote Mary Trump in her latest email blast — specifically calling out Morning Joe’s Mika Brzezinski and The New York Times’ Maureen Dowd — you would be under the impression “Democrats lost touch with the working class because they talked too much about transgende…