In an exclusive interview, Mary Trump, the President's niece tells ABC News it's "dangerous" for her uncle to lead the US. This is the first time Mary Trump has spoken out since the publication of her explosive new book, "Too Much and Never Enough: How My Family Created the World's Most Dangerous Man." PLUS, teachers across the country are raising concerns about reopening schools too soon. In Florida, the state has mandated that in-person classes resume next month but teachers say not so fast. A