MANILA, PHILIPPINES - MAY 07: Presidential frontrunner Rodrigo Duterte gestures during his final campaign rally on May 7, 2016 in Manila, Philippines. Duterte, a tough-talking mayor of Davao in Mindanao has been the surprise pre-election poll favourite pulling away from his rivals despite controversial speeches and little national government experience. Opinion polls has shown Mr Duterte has maintained a clear lead in the Philippines as Senator Grace Poe looks at impossible odds. The Philippine presidential campaign ends on May 7 with elections slated for May 9 and features 5 presidential candidates vying for the top post. (Photo by Dondi Tawatao/Getty Images)
