The Tongatapu 2 by-election on 8 October stems from the Court of Appeal upholding the unseating of former MP Semisi Sika over breaches of electoral expense rules in the 2025 general election, leaving the seat vacant after less than a year. Nine independent candidates have registered following nominations in early September, including Alvin Lafu Sika, Mele Teusivi 'Amanaki, 'Ilaisa Lepolo Taunisila, Lei Paasi, Samiuela Vea, 'Olioni Manoa, Mounu Uaisele, Sione Harvard Tupouniua, and Malakai Matafonuafo'ou 'Ofa ki Wakawaka Koloamatangi. Three early entrants withdrew to consolidate support behind Koloamatangi, yet the field remains fragmented with no dominant frontrunner. Voter registration closes on 23 September, and the absence of polling or a clear path to a majority keeps implied probabilities closely matched among the leading contenders.