Republican presidential nominee Donald Trump speaks during a roundtable meeting with African American business, civic and religious leaders in Philadelphia, Pennsylvania, U.S., September 2, 2016. REUTERS/Carlo Allegri

A photo taken from a mobile phone shows a general view of the site of an explosion at a night market in Davao City, in southern island of Mindanao, on late September 2, 2016. At least 10 people died and dozens were injured when an explosion rocked Philippine President Rodrigo Duterte's home city of Davao on September 2, 2016 night, police told AFP. The explosion occurred in a bustling part of the city and close to one of its top hotels that is popular with tourists and business people, city spokeswoman Catherine dela Rey said. / / AFP PHOTO / STRINGERSTRINGER/AFP/Getty Images

A photo taken from a mobile phone shows a general view of the site of an explosion at a night market in Davao City, in southern island of Mindanao, on late September 2, 2016. At least 10 people died and dozens were injured when an explosion rocked Philippine President Rodrigo Duterte's home city of Davao on September 2, 2016 night, police told AFP. The explosion occurred in a bustling part of the city and close to one of its top hotels that is popular with tourists and business people, city spokeswoman Catherine dela Rey said. / / AFP PHOTO / STRINGERSTRINGER/AFP/Getty Images

Vice Chancellor, Economy and Energy Minister Sigmar Gabriel attends a Social Democrats (SPD) party campaign event prior to regional elections on September 2, 2016 in Rostock, north-eastern Germany. Regional elections will be held on September 4, 2016 on German Chancellor Angela Merkel's home turf of Mecklenburg-Western Pomerania, where her Christian Democratic Union (CDU) party is trailing in the polls. / AFP PHOTO / Adam BERRYADAM BERRY/AFP/Getty Images

(L-R) Erwin Sellering, state premier of the German state of Mecklenburg-Vorpommern, Vice Chancellor, Economy and Energy Minister Sigmar Gabriel (SPD) and German Family Minister Manuela Schwesig arrive for a Social Democrats (SPD) party campaign event prior to regional elections on September 2, 2016 in Rostock, north-eastern Germany. Regional elections will be held on September 4, 2016 on German Chancellor Angela Merkel's home turf of Mecklenburg-Western Pomerania, where her Christian Democratic Union (CDU) party is trailing in the polls. / AFP PHOTO / Adam BERRYADAM BERRY/AFP/Getty Images

Vice Chancellor and Economy and Energy Minister Sigmar Gabriel and German Family Minister Manuela Schwesig (R) attend a German Social Democrats (SPD) party campaign event prior to regional elections on September 2, 2016 in Rostock, north-eastern Germany. Regional elections will be held on September 4, 2016 on German Chancellor Angela Merkel's home turf of Mecklenburg-Western Pomerania, where her Christian Democratic Union (CDU) party is trailing in the polls. / AFP PHOTO / Adam BERRYADAM BERRY/AFP/Getty Images

Vice Chancellor and Economy and Energy Minister Sigmar Gabriel and German Family Minister Manuela Schwesig (R) attend a German Social Democrats (SPD) party campaign event prior to regional elections on September 2, 2016 in Rostock, north-eastern Germany. Regional elections will be held on September 4, 2016 on German Chancellor Angela Merkel's home turf of Mecklenburg-Western Pomerania, where her Christian Democratic Union (CDU) party is trailing in the polls. / AFP PHOTO / Adam BERRYADAM BERRY/AFP/Getty Images

Vice Chancellor and Economy and Energy Minister Sigmar Gabriel and German Family Minister Manuela Schwesig (R) attend a German Social Democrats (SPD) party campaign event prior to regional elections on September 2, 2016 in Rostock, north-eastern Germany. Regional elections will be held on September 4, 2016 on German Chancellor Angela Merkel's home turf of Mecklenburg-Western Pomerania, where her Christian Democratic Union (CDU) party is trailing in the polls. / AFP PHOTO / Adam BERRYADAM BERRY/AFP/Getty Images