A Philippine midterm election may have leaned in President Ferdinand Marcos Jr's favour but the stronger-than-expected showing for estranged vice president and bitter rival Sara Duterte may have given him a jolt,

Here’s what to know about the crucial midterms and the rival dynasties at the heart of the Southeast Asian nation’s politics.

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.