The December 2026 presidential election in Guinea-Bissau follows a November 2025 coup that annulled prior results and installed a military transitional government, with the vote intended to restore civilian rule under a newly approved constitution. That charter, backed by 70% in an August referendum boycotted by the main opposition PAIGC, expands presidential authority over the prime minister, cabinet, and parliament while shrinking the legislature and imposing a five-year residency requirement for candidates. The fragmented field leaves Fernando Dias da Costa, backed by PAIGC networks after emerging as the leading challenger in the disputed 2025 contest, and former president Umaro Sissoco Embaló nearly tied at the top of trader pricing. Remaining contenders trail sharply, reflecting limited consolidation of support amid post-coup realignments, eligibility scrutiny, and the absence of dominant party structures or recent polling. Upcoming campaign developments and any further institutional moves could narrow the field before the December ballot.