In the run-up to the highly anticipated Sept. 10 presidential debate, Mary Trump, niece of Donald Trump, has offered some strategic advice to Vice President Kamala Harris. What Happened: Mary Trump proposed that Harris should capitalize on her prosecutorial background during the debate. Speaking with USA Today, she advised Harris to concentrate on debunking her uncle’s inaccurate assertions, rather than focusing on her policy plans. Mary Trump, a known critic of her uncle, depicted the election as a contest between a prosecutor and a criminal, a tactic that has been a key part of Harris’ campa…