President Trump flown to Walter Reed Medical center after Covid-19 diagnosis, contact tracing underway at the White House, and how former presidents have dealt with health challenges. Watch “NBC Nightly News With Lester Holt” at 6:30 p.m. ET / 5:30…

Jimmy talks about Donald & Melania Trump testing positive for COVID-19, Trump being taken to Walter Reed Hospital out of an abundance of caution, the various theories about how or when he may have contracted it, all of the people…