This week, Emily Bazelon, John Dickerson, and David Plotz discuss how Trump is using the powerful machine of government prosecution to reverse-engineer crimes supposedly committed by enemies, his diatribe against Tylenol at the disastrous press conference on autism, and the echoes of past Red Scares in today's free speech climate with historian Beverly Gage, author of the Pulitzer Prize-winning G-Man: J. Edgar Hoover and the Making of the American Century.