Philippine investigators on Tuesday summoned Vice President Sara Duterte to answer questions about her public threat to have President Ferdinand Marcos Jr assassinated if she herself were killed. The National Bureau of Investigation served the subpoena at Duterte’s office, and asked that she appear before the bureau’s director on Friday. The subpoena said Duterte was being summoned “to shed light on the investigation for alleged grave threats under [the Cybercrime Prevent Act] and possible viola