Philippine Presidential Candidates Campaign On Labour Day

UNSPECIFIED, PHILIPPINES - MAY 01: Presidential candidate Rodrigo Duterte campaigns among supporters on May 1, 2016 in the Philippines. Duterte, the tough-talking mayor of Davao in Mindanao has been the surprise pre-election poll favorite, pulling away from his rivals despite controversial speeches and little national government experience. Opinion polls have shown Mr. Duterte has maintained his lead with 33 percent support, with Senator Grace receiving 22 percent. The Philippine presidential elections will be held on May 9, with five candidates vying for the top post. (Photo by Jes Aznar/Getty Images)