MANILA, Philippines — The system for confidential fund (CF) expenditures employed by Vice President Sara Duterte’s offices mimicked that of Davao City — with the same personnel involved in the city’s secret fund use being present and brought over to the national scene. In a press briefing on Friday, Lanao del Sur Rep. Zia Alonto Adiong and prosecution impeachment advisor Robert Ace Barbers made a presentation detailing the similarities in how th…