President Donald Trump heads to Walter Reed Medical Center after both he and First Lady Melania Trump tested positive for Covid-19. The latest on his condition. Then, former Principal Deputy Director of National Intelligence and CNBC Contributor Sue Gordon weighs national security risks, precautionary measures, and typical protocols during emergencies. CNBC Reporter Ylan Mui reports that Lindsey Graham, chair of the Senate Judiciary Committee, says he has tested negative for Covid-19. The timeline of events and contact tracing efforts to understand who may have been exposed. Plus, the Biden campaign says it will pull all negative advertising.