President Rodrigo Roa Duterte delivers his speech during the Partido Demokratiko Pilipino-Lakas ng Bayan (PDP-Laban) campaign rally at the University of Science and Technology of Southern Philippines in Cagayan de Oro City on March 24, 2019.

President Rodrigo Roa Duterte passes a copy of the book “Altar of Secrets” by Aries Rufo while delivering his speech during the Partido Demokratiko Pilipino-Lakas ng Bayan (PDP-Laban) campaign rally at the University of Science and Technology of Southern Philippines in Cagayan de Oro City on March 24, 2019. ARMAN BAYLON/PRESIDENTIAL PHOTO
President Rodrigo Roa Duterte delivers his speech during the Partido Demokratiko Pilipino-Lakas ng Bayan (PDP-Laban) campaign rally at the University of Science and Technology of Southern Philippines in Cagayan de Oro City on March 24, 2019. ARMAN BAYLON/PRESIDENTIAL PHOTO
President Rodrigo Roa Duterte bows before thousands of supporters at the Partido Demokratiko Pilipino-Lakas ng Bayan (PDP-Laban) campaign rally at the University of Science and Technology of Southern Philippines in Cagayan de Oro City on March 24, 2019. ROBINSON NIÑAL JR./PRESIDENTIAL PHOTO
Thousands of supporters listen as President Rodrigo Roa Duterte delivers his speech during the Partido Demokratiko Pilipino-Lakas ng Bayan (PDP-Laban) campaign rally at the University of Science and Technology of Southern Philippines in Cagayan de Oro City on March 24, 2019. ROBINSON NIÑAL JR./PRESIDENTIAL PHOTO
President Rodrigo Roa Duterte delivers his speech during the Partido Demokratiko Pilipino-Lakas ng Bayan (PDP-Laban) campaign rally at the University of Science and Technology of Southern Philippines in Cagayan de Oro City on March 24, 2019. JOEY DALUMPINES/PRESIDENTIAL PHOTO
President Rodrigo Roa Duterte delivers his speech during the Partido Demokratiko Pilipino-Lakas ng Bayan (PDP-Laban) campaign rally at the University of Science and Technology of Southern Philippines in Cagayan de Oro City on March 24, 2019. JOEY DALUMPINES/PRESIDENTIAL PHOTO
Thousands of supporters listen as President Rodrigo Roa Duterte delivers his speech during the Partido Demokratiko Pilipino-Lakas ng Bayan (PDP-Laban) campaign rally at the University of Science and Technology of Southern Philippines in Cagayan de Oro City on March 24, 2019. JOEY DALUMPINES/PRESIDENTIAL PHOTO