Disagreement between supporters of former Sarawak Progressive Democratic Party (SPDP) president William Mawan Ikom and supporters of former Sarawak United People’s Party (SUPP) deputy secretary-general Wong Soon Koh as to who should lead the Dayak-based party Parti Tenaga Rakyat Sarawak (Teras) is said to have led Wong and three other elected representatives aligned to him to form their own party - United People’s Party (UPP).