The line ‘if it bleeds, it leads’ marks a key moment in director Antonio Campos’ (Simon Killer) latest movie Christine, about the grim story of US newswoman Christine Chubbuck. Based on real events, this deeply cynical line is delivered in a time when the news started to turn tabloid in the 70s, and sums up much of what the filmmaker is criticising in this shocking, yet intensely mesmerising, depiction of the reporter’s last days. Rebecca Hall (The Gift) stars as Chubbuck, an intelligent but highly strung news reporter whose personal life and career collide, causing her world to spiral out of…