‘Vanity Fair’ reporter Gabriel Sherman talks about former Fox News co-president Bill Shine’s new role as deputy chief of staff, the president’s relationship with Sean Hannity, and the ways in which Trump acts as an “executive producer” of the cable news network. Also, critic David Edelstein reviews the documentary ‘Three Identical Strangers’ about triplets separated at birth and then reunited. Author Paul Greenberg talks efficacy of fish oil supplements. His new book is ‘The Omega Principle.‘