Tonight: Shocking new details of Trump's push to overturn his election loss—and what we know about the people helping him. Then, why the Justice Department is suddenly saying Donald Trump's tax returns must be handed to Congress. Plus, the alarming new CDC data driving the latest mask guidance and the absurd backlash it has inspired. And new NBC reporting on whistleblowers who say they were told to downplay a Covid outbreak among migrant kids at a shelter. Guests: Devlin Barrett, Daniel Goldman, Betsy Woodruff Swan, Dr. Peter Hotez, Julia Ainsley