Former Philippine President Rodrigo Duterte and his two sons could seek roles in the Senate as the family fights for political influence in the 2025 midterm elections, amid a widening rift with President Ferdinand Marcos Jr.

The May 2025 election will be a litmus test of Marcos' popularity and a chance to consolidate power and groom a successor, which the influential Duterte family has signalled it is determined to stop after an acrimonious falling out. Philippine presidents are limited to a single, six-year term.

Registration gets underway in the Philippines on Tuesday for one of the world's biggest midterm elections, headlined by what could be a bitter proxy battle between President Ferdinand Marcos Jr and fiery predecessor Rodrigo Duterte.