The impeachment trial of Vice-President Sara Duterte-Carpio begins amid a power struggle for the Senate presidency, which could influence the trial's direction and the fallout from charges against her father.

The Philippine Senate convened on Monday as an impeachment court for Vice-President Sara Duterte-Carpio, even as a fresh battle for control of the chamber threatens to shape the direction of her trial and the fallout from the crimes-against-humanity case against her father, former president Rodrigo Duterte, in The Hague. Duterte-Carpio was impeached by the House of Representatives last week on allegations including corruption, betrayal of public trust and culpable violations of the constitution....