OCTA Research's latest 2028 Presidential Political Map showed a geographically divided electorate, with Vice President Sara Duterte maintaining overwhelming support in Mindanao and leading in the Visayas, while former vice president and Naga City mayor Leni Robredo continued to dominate most parts of Luzon in a hypothetical presidential contest.The political map is based on OCTA's Q2 2026 Tugon ng Masa (TNM) national survey, conducted from July …