Former Philippine President Rodrigo Duterte was almost certain to be elected mayor of his home city by a landslide on Monday, unimpeded by his detention at the International Criminal Court on charges of murder as a crime against humanity.

The Philippines now faces the unique challenge of a mayor governing in absentia from The Hague – though his son could step in to help.

Despite the ICC's case also including alleged killings of criminal suspects by a "death squad" in Davao while Duterte was mayor - which he has denied - analysts have said his arre